Updated the C::B project file to properly support GLEW and the new files...

Updating the dependencies file is left to be done.
Added an info window explaining the currently selected option.

Part of #155
Updated the C::B dependencies link to add GLEW.
Finished adding the explanation window texts.

Part of #155
Made the explanation text scroll...
Finishing the grid drawing changes.
A minor update to the credits.
Changing a list to a vector.
Personal code review of the OpenGL features.  Merged the sprite classes for simplicity.
Fixing a compiler warning.
Fixing a bug with TexSheet::DEBUG_Draw.
Merging some shaders to simplify the code base.