TrueType rasterizer

Hi. Here is a C version of my TrueType rasterizer. The rasterizer produces good quality glyphs, but it's not very fast at the moment - the next version will support pre-computed glyphs which i guess will increase the performance few time atleast. Also gradients will be supported (plus maybe few other color modes), probably there will be some other smaller improvements too. The library started as a C++ library, but i think i will remove it and will work on the C version only as the code for both is almost the same - if someone wants to compile a C++ version it would be easily possible.