Update README.md

Reorder sections, update table of content, add notes and issue tracker link for Windows Linux subsystem and Git-bash builds.

README.md

@@ -2,7 +2,10 @@
 
 <!--ts-->
    * [Linux build](#linux)
-   * [Windows build](#windows)
+   * Windows build
+     * [Using Arduino](#using-arduino)
+     * [Using Linux subsystem](#using-linux-subsystem-under-windows-10-64-bit)
+     * [Using Git-bash](#using-git-bash-under-windows-10-64-bit)
    * [Automated tests](#3-automated-tests)
    * [Documentation](#4-documentation)
 <!--te-->
@@ -16,56 +19,9 @@ If you wish to flash from Arduino, follow step [2.c](#2c) from Windows build fir
 
 The script downloads Arduino with our modifications and Rambo board support installed, unpacks it into folder PF-build-env-\<version\> on the same level, as your Prusa-Firmware folder is located, builds firmware for MK3 using that Arduino in Prusa-Firmware-build folder on the same level as Prusa-Firmware, runs secondary language support scripts. Firmware with secondary language support is generated in lang subfolder. Use firmware.hex for MK3 variant. Use firmware_\<lang\>.hex for other printers. Don't forget to follow step [2.b](#2b) first for non-MK3 printers.
 ## Windows
-### If you want to use the automated `PF-build.sh` you gonna need to install on you Windows a Linux subsystem or Git-bash
-
-### Steps for Linux subsystem und Windows 10 64-bit:
-- follow the Microsoft guide https://docs.microsoft.com/en-us/windows/wsl/install-win10
-  You can also use the 'prepare_winbuild.ps1' powershell script with Administrator rights
-- Tested versions are at this moment
-  - Ubuntu other may different
-  - After the installation and reboot please open your Ubuntu bash and do following steps
-  - run command `apt-get update`
-  - to install zip run `apt-get install zip`
-  - add few lines at the top of `~/.bashrc` by running `sudo nano ~/.bashrc`
-	
-	export OS="Linux"
-	export JAVA_TOOL_OPTIONS="-Djava.net.preferIPv4Stack=true"
-	export GPG_TTY=$(tty)
-	
-	use `CRTL-X` to close nano and confirm to write the new entries
-  - restart Ubuntu bash
-Now your Ubuntu subsystem is ready to use the automatic `PF-build.sh` script and compile your firmware correctly
-
-#### Some Tips for Ubuntu
-- Linux is case sensetive so please don't forget to use capital letters where needed, like changing to a directory
-- To change the path to your Prusa-Firmware location you downloaded and unzipped
-  - Example: You files are under `C:\Users\<your-username>\Downloads\Prusa-Firmware-MK3`
-  - use under Ubuntu the following command `cd /mnt/c/Users/<your-username>/Downloads/Prusa-Firmware-MK3`
-    to change to the right folder
-
-#### Compile Prusa-firmware with Ubuntu Linux subsystem installed
-- open Ubuntu bash
-- change to your source code folder (case sensitive)
-- run `./PF-build.sh`
-- follow the instructions
-
-### Steps for Git-bash under Windows 10 64-bit:
-- Download and install the 64bit Git version https://git-scm.com/download/win
-- Also follow these instructions https://gist.github.com/evanwill/0207876c3243bbb6863e65ec5dc3f058
-- Download and install 7z-zip from its official website https://www.7-zip.org/
-  By default, it is installed under the directory /c/Program Files/7-Zip in Windows 10
-- Run `Git-Bash` under Administrator privilege
-- navigate to the directory /c/Program Files/Git/mingw64/bin
-- run `ln -s /c/Program Files/7-Zip/7z.exe zip.exe`
-
-#### Compile Prusa-firmware with Git-bash installed
-- open Git-bash
-- change to your source code folder
-- run `bash PF-build.sh`
-- follow the instructions
-
-
-### 1. Development environment preparation
+### Using Arduino
+note: Multi language build is not supported.
+#### 1. Development environment preparation
 
    a. install `"Arduino Software IDE"` for your preferred operating system  
 `https://www.arduino.cc -> Software->Downloads`  
@@ -97,7 +53,7 @@ add "-Wl,-u,vfprintf -lprintf_flt -lm" to "compiler.c.elf.flags=" before existin
 example:  
 `"compiler.c.elf.flags=-w -Os -Wl,-u,vfprintf -lprintf_flt -lm -Wl,--gc-sections"`
 
-### 2. Source code compilation
+#### 2. Source code compilation
 
 a. place the source codes corresponding to your printer model obtained from the repository into the selected directory on your disk  
 `https://github.com/prusa3d/Prusa-Firmware/`  
@@ -125,6 +81,55 @@ or you can also save the output code to the file (in so called `HEX`-format) `"F
 and then upload it to the printer using the program `"FirmwareUpdater"`  
 _note: this file is created in the directory `"Firmware/"`_  
 
+### Using Linux subsystem under Windows 10 64-bit
+_notes: Script and instructions contributed by 3d-gussner. Use at your own risk. Script downloads Arduino executables outside of Prusa control. Report problems [there.](https://github.com/3d-gussner/Prusa-Firmware/issues) Multi language build is supported._
+- follow the Microsoft guide https://docs.microsoft.com/en-us/windows/wsl/install-win10
+  You can also use the 'prepare_winbuild.ps1' powershell script with Administrator rights
+- Tested versions are at this moment
+  - Ubuntu other may different
+  - After the installation and reboot please open your Ubuntu bash and do following steps
+  - run command `apt-get update`
+  - to install zip run `apt-get install zip`
+  - add few lines at the top of `~/.bashrc` by running `sudo nano ~/.bashrc`
+	
+	export OS="Linux"
+	export JAVA_TOOL_OPTIONS="-Djava.net.preferIPv4Stack=true"
+	export GPG_TTY=$(tty)
+	
+	use `CRTL-X` to close nano and confirm to write the new entries
+  - restart Ubuntu bash
+Now your Ubuntu subsystem is ready to use the automatic `PF-build.sh` script and compile your firmware correctly
+
+#### Some Tips for Ubuntu
+- Linux is case sensetive so please don't forget to use capital letters where needed, like changing to a directory
+- To change the path to your Prusa-Firmware location you downloaded and unzipped
+  - Example: You files are under `C:\Users\<your-username>\Downloads\Prusa-Firmware-MK3`
+  - use under Ubuntu the following command `cd /mnt/c/Users/<your-username>/Downloads/Prusa-Firmware-MK3`
+    to change to the right folder
+
+#### Compile Prusa-firmware with Ubuntu Linux subsystem installed
+- open Ubuntu bash
+- change to your source code folder (case sensitive)
+- run `./PF-build.sh`
+- follow the instructions
+
+### Using Git-bash under Windows 10 64-bit
+_notes: Script and instructions contributed by 3d-gussner. Use at your own risk. Script downloads Arduino executables outside of Prusa control. Report problems [there.](https://github.com/3d-gussner/Prusa-Firmware/issues) Multi language build is supported._
+- Download and install the 64bit Git version https://git-scm.com/download/win
+- Also follow these instructions https://gist.github.com/evanwill/0207876c3243bbb6863e65ec5dc3f058
+- Download and install 7z-zip from its official website https://www.7-zip.org/
+  By default, it is installed under the directory /c/Program Files/7-Zip in Windows 10
+- Run `Git-Bash` under Administrator privilege
+- navigate to the directory /c/Program Files/Git/mingw64/bin
+- run `ln -s /c/Program Files/7-Zip/7z.exe zip.exe`
+
+#### Compile Prusa-firmware with Git-bash installed
+- open Git-bash
+- change to your source code folder
+- run `bash PF-build.sh`
+- follow the instructions
+
+
 # 3. Automated tests
 ## Prerequisites
 c++11 compiler e.g. g++ 6.3.1