Merge pull request #4 from andrewcorrigan/master

fix for https://github.com/memononen/nanovg/issues/3
Updated fontstash
Fixed issue #6, font atlas size was not passed to create texture
Fix text rendering flickering under rotation

- quantize font rendering scale
- round kerning values for less flicker
Fixed issue #8
MSVC compile fix (example); win32 screenshot added
Merge pull request #9 from r-lyeh/master

MSVC compile fix (example); win32 screenshot added
Implemented OGL 3.2 core profile back-end

- moved demo stuff to separate file
- created two separate examples for gl2 and gl3
- initial stab at OGL 3.2 core profile back-end (currently twice as
slows as 2.0)
- API change: glBeginFrame() takes view witdth and height as input
- added FPS counter to demo
Improved rendering performance of convex shapes and on gl3 back-end

- set swap interval to 0 to better see performance
- draw convex shapes without stencil to speed things up
- improve vertex buffer upload for gl3
use glewExperimental = GL_TRUE on 3.2 core profile
Fix issue #10

- link to framework CoreVideo on OSX, fixes compiling on OSX 10.9
Better rounding for quantization to remove text rendering jitter
Apllied vs2010 compiler fixes from fontstash.
Fix for issue #11, added C++ guards
uses window size rather than frame buffer size