Created Build and install (markdown)

Build-and-install.md

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+**In-progress**
+
+## Dependencies
+
+* [CMake](https://cmake.org/)
+
+**Mac**
+
+* [Xcode Command Line Tools](https://developer.apple.com/xcode/) (_xcode-select --install_ from a terminal)
+
+**Windows**
+
+* [MSYS2](https://www.msys2.org/)
+* [Visual Studio Build Tools](https://visualstudio.microsoft.com/downloads/)
+
+## Build
+
+For building akvirtualcamera, open a terminal and run the following commands:
+
+**Mac**
+
+```
+cmake -S /path/to/akvirtualcamera -B /path/to/akvirtualcamera-build-directory
+make -C /path/to/akvirtualcamera-build-directory
+```
+
+**MSYS2**
+
+```
+cmake -G "MSYS Makefiles" -S /path/to/akvirtualcamera -B /path/to/akvirtualcamera-build-directory
+make -C /path/to/akvirtualcamera-build-directory
+```
+
+**Visual Studio**
+
+```
+cmake -G "Visual Studio 16 2019" -S /path/to/akvirtualcamera -B /path/to/akvirtualcamera-build-directory
+cmake --build /path/to/akvirtualcamera-build-directory
+```
+
+You can also compile akvirtualcamera using [cmake-gui](https://cmake.org/cmake/help/latest/guide/user-interaction/index.html#cmake-gui-tool).
+
+## Install
+
+**Mac**
+
+**Windows**