- fixing various issues for building under visual studio

 -- fixed min/max redefined warnings
 -- including platform.h for round under visual studio
 -- fixing consistency of const modifiers between function declaration and definition
 -- moving local definitions to top of function to build under visual studio (not c99 compliant)

Various fixes and tweaks

Added glActiveTexture so correct texture unit is bound. Removed deprecated glEnable( GL_TEXTURE_2D )

texture_font_load_glyphs 'loading glyphes already loaded' problem resolv...

Use Markdown for README file

Link OpenGL after freetype-gl. Fixes #2

Fix project file generation without demos

Also adds the _CRT_SECURE_NO_WARNINGS definition to fix some compilation
warnings for visual studio.

this commit renames texture_font_new() to texture_font_new_from_file()
and also implements texture_font_new_from_memory() for creating
texture fonts from font files that are already loaded somewhere in
memory (for example, fonts embedded inside an application).

Various fixes from cforfang

Issue 64 (Google Code): removed unused ft_bitmap_pitch, as well as ft_bitmap_width and ft_bitmap_rows (can read from ft_bitmap directly)

demo-cube's timer-callback wasn't working because of bug in GLUT (see references below); changed to use clock() instead

References:
- http://stackoverflow.com/questions/19133222/gluttimerfunc-callback-function-isnt-executed-if-time-threshold-is-under-a-ce
- http://www.opengl.org/discussion_boards/showthread.php/164209-glutTimerFunc-issues-with-Vista

Add parameters to makefont executable. (#61 on google code)