Port of FPDF to C# and utility library

Note that this is a port made using an automated tool with some fixes, mostly for fun purposes.

This is the license as stated by the original author of FPDF:

Permission is hereby granted, free of charge, to any person obtaining a copy of this software to use, copy, modify, distribute, sublicense, and/or sell copies of the software, and to permit persons to whom the software is furnished to do so.

For any substantial changes introduced by me, MIT license will apply.