1_OpenGL3: fixed memory leaks
1_OpenGL3: fixed windows client area size
1_OpenGL3: fixed LGL includes and types
Fixed sLGLAPI struct setup on Win32
Removed ununsed JNI methods (JavaEnter, JavaLeave, FindJavaStaticMethod)
Cleaner implementation of Str_AddTrailingChar()
3_ShadersAndVertexArrays: cleaner source code formatting in clGLSLShaderProgram