Generated new bitmap fonts and put them into gui/fonts folder.
Implemented skeleton readers and test files for maps, enemies and towers data.
Implemented Resources and GameData classes and moved relevant code from GermDefense class into those classes.
Implemented adding of new towers in play screen interface. This feature is not yet finished, context menu does't change based on selected tile and stuff on it (is it buildable, tower already exists etc).
Fixed some issues with tile section in GameMap class.
Several other refactorings/changes.