Remove dependence from SDL_image which using for load png files. Add own png loader for direct using libpng.
Improved FileList dir listing. fixed (Issue #190)
refactoring overlay drawing. Set tile picture constant pointer. Add
options image to BuildingData for use it in construction.model, but not
hardcode.
Citizens name generator add.
Test travic-ci build.
test commit travis integration.
travis test
Update .travis.yml
Update .travis.yml
Update .travis.yml
INSTALL_LINUX fix. travis test.
Goods types improved. Farm animation fixed.
names.model fixed. Walker now have names. Add infobox for walker.
WalkerTraineeType union with WalkerType.
Merge branch 'master' of https://github.com/gecube/opencaesar3

Conflicts:
	oc3_gui_info_box.hpp
Engineer creating fixed.
Engineer save/load fixed.
Doctor save/load fixed.
Plague ruins add. Doctor alg fixed. Prefect now fired ill houses.
Merge pull request #194 from dalerank/master

Citizens now have names. no dependence from SDL_image. Goods types refactoring.