i18n and some TODOs
* update labels after language change
* use SANS_SERIF font instead of Arial
* implement directory links
* implemented reset settings
* error messages (GUI)
Some more TODOs
Merge branch 'develop' of github.com:MovingBlocks/TerasologyLauncher into develop

Conflicts:
	src/main/java/org/terasologylauncher/gui/SettingsMenu.java
Merge pull request #30 from skaldarnar/develop

i18n and some TODOs