Extract text file reading to shared utils module.
Making shaders manager.
Fixing the bugs in shader program manager.
Making shader manager. Suggested to imply that shader programs include to handler.
Shader program initialization example.
Small change.
Small change.
Lagged algorithm of shader program. Needs to improve.
Shader program improvements. A little faster than previous, and little easy to set.
Added shader program activate function.
Drawing function executes at shader program.
Removed artificial GL draw modes and brought the natives modes back.
First worked shader manager.
Merge pull request #2 from Zemledelec/master

Shader manager is ready to work.