Changed struct names, fixed color parser bug and added rasterizer

- changed struct names from NSVGShape to NSVGshape
- fixed silly bug in color parser (plus reversed the r/b)
- changed the shape order so that they are in order they are parsed
- added super simple svg rasterizer based on stb_truetype rasterizer
- added example for the rasterizer
Added pool alloc for active edges, improved tesselation algo, better guessing of image size

- added pool alloc for active edges
- improved tesselation algo
- better guessing of image size
- reverted tiger to default state
Updated documentation