message: Added linux dependency install command to readme
diff: @@ -59,6 +59,12 @@ If Qt is not installed from your distribution's package manager, you will need t
  These dependencies are mandatory:
  * libXScrnSaver (`libxss-dev` in deb-based distros and `libXScrnSaver-devel` in rpm-based)
  + You can install them all in debian with a command:
  + ```
  + sudo apt install libxss-dev build-essential libgl-dev libreadline-dev
  +
  + ```
  +
  These dependencies are optional and will be bundled if the `USE_BUNDLED_LIBRARIES` CMake argument is set or your system does NOT have their development packages installed:
  * POCO
  * Lua
  