Refactor rendering

[vidstige]

• Adding the GlyphBuilderBase as a normal class.
• Adding GDI rasterizer.

[vidstige]

Please take a look @prepare

[vidstige]

The GDI renders does not super good, but still better than my software rendering.

• I want to use the term "rasterize" for taking a vector description and rasterizing to a razter, e.g. pixels
• I want to use the term render to take a string and a typeface and draw it. This includes placing each letter, calling the rasterizer implementation. Then you can have different rasterizer implementations like Agg, software (NRasterizer) or GDI+

What to you think about this?

I'm almost ready to make the NuGet package. Please let me know if this will work for you Agg rasterizer.

[prepare]

OK, I agree