Added SDL backend (mode 5) and a small, basic tileset.
Fixed a silly warning pending some issues regarding display backends on servers
Changed configuration extension for tileset data
...and fixed where the code looks for the file
Alignment in iiag.cfg
Servers use seperate config file
Quick fix of a potential NULL dereference
Changed font to the masterful Gohu font.
Merge pull request #38 from iiag/sdl

Added SDL backend (mode 5) and a small, basic tileset.