Adding README

README.md

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+### Ownership and License
+
+The contributors are listed in CONTRIB.TXT. This project uses the GPL v3 license, see LICENSE.TXT.
+This project uses the [C4.1 (Collective Code Construction Contract)](http://rfc.zeromq.org/spec:22) process for contributions.
+To report an issue, use the [issues page](https://envox.hr/gitea/goran-mahovlic/eez-flow-template-stm32l496g-disco/issues) tracker.
+
+## Build
+
+First, build the project using EEZ Studio.
+
+### STM32 binary
+
+Import project from {{projectDirPath}} into STM32CubeIDE and build it.
+
+### Simulator
+
+#### Linux
+
+```
+sudo apt-get update
+sudo apt-get install -y git libsdl2-dev libsdl2-image-dev libsdl2-ttf-dev cmake build-essential libbsd-dev
+cd {{projectDirPath}}
+mkdir -p Src/build/linux
+cd Src/build/linux
+cmake ../..
+make
+```
+
+Start simulator with:
+
+```
+./{{projectName}}
+```
+
+
+#### Windows
+
+Install [Visual Studio Community 2017](https://visualstudio.microsoft.com/downloads/) and [CMake](https://cmake.org/install/).
+
+Download and install SDL2 development libraries for Windows from https://www.libsdl.org/download-2.0.php. 
+
+Download and install SDL2_Image development libraries for Windows from https://github.com/libsdl-org/SDL_image/releases.
+
+Update these environment variables in `cmake.bat` according to the location (and version) where SDL2 and SDL2_Image has been installed:
+
+```
+set SDL2DIR=..\SDL2-2.0.14
+set SDL2IMAGEDIR=..\SDL2_image-2.0.4
+```
+
+Execute `cmake.bat`:
+
+```
+cd {{projectDirPath}}\Src
+.\cmake.bat
+```
+
+Visual Studio solution is created in `{{projectDirPath}}\Src\build\win32`.
+
+Use Visual Studio to build the solution.
+
+#### Emscripten
+
+These instructions are for the Linux.
+
+[Download and install Emscripten](https://emscripten.org/docs/getting_started/downloads.html)
+
+```
+source /path/to/emsdk/emsdk_env.sh
+export EMSCRIPTEN=/path/to/emsdk/upstream/emscripten
+mkdir -p {{projectDirPath}}/Src/build/emscripten
+cd {{projectDirPath}}/Src/build/emscripten
+cmake -DCMAKE_TOOLCHAIN_FILE=../../cmake/Emscripten.cmake -DCMAKE_BUILD_TYPE=Debug -G "Unix Makefiles" ../..
+make
+```