-[SHADERS] Created header files for each shader, in preparation to embed the shaders in the code.
-[SHADERS] Added a way to initialize EJGLProgram2D with shaders source strings.
-[SHADERS] Default shaders are now loaded from their embedded versions.
-[PROJECT] Added embedded shader header files to project.
Merge branch 'EmbeddedShaders' of github.com:TrompoGames/Ejecta into TrompoGames