corrected include guards, added comments

include/ACGL/ACGL.hh

include/ACGL/Base/CompileTimeSettings.hh

include/ACGL/Base/FileHelpers.hh

include/ACGL/Base/FileOperations.hh

include/ACGL/Base/Settings.hh

include/ACGL/Base/Singleton.hh

include/ACGL/Base/StringOperations.hh

include/ACGL/Math/Constants.hh

include/ACGL/Math/Functions.hh

include/ACGL/Math/Math.hh

include/ACGL/OpenGL/Controller.hh

include/ACGL/OpenGL/Controller/ArrayBufferControl.hh

include/ACGL/OpenGL/Controller/ElementArrayBufferControl.hh

include/ACGL/OpenGL/Controller/FrameBufferControl.hh

include/ACGL/OpenGL/Controller/RenderBufferControl.hh

include/ACGL/OpenGL/Controller/ShaderControlFile.hh

...e/ACGL/OpenGL/Controller/ShaderProgramControlAutoFiles.hh

include/ACGL/OpenGL/Controller/TextureControl.hh

include/ACGL/OpenGL/Controller/TextureControlFileJPG.hh

include/ACGL/OpenGL/Controller/VertexBufferControl.hh