Glow:- Program, added SetUniform overloads for GLuint and GLfloat.
Merge branch 'master' of https://github.com/MarkIngramUK/glow

* 'master' of https://github.com/MarkIngramUK/glow:
  Glow:- Matrix, renamed CreateOrthogonal to SetToOrthogonal (added Matrix files to Windows project). Test01:- Renderer & Vertex shader, apply a view matrix of 640x480 rather than using the default clip space.
  Glow:- Debug, exported ClearErrors and CheckError. - File, fixed loading of text files (broken in previous commit). - Glow, check errors during initialisation. Test01:- Updated shaders to be 3.30 compatible, rather than OpenGL ES 1.00 (not sure why I wrote it like that...) - Renderer, fixed drawing as vbo was going out of scope. - Main, create an OpenGL 3.3 context.
  Glow:- Removed PCH usage (caused too much trouble with the C files in libPng and libZlib).