Removing checked in dependencies as Maven now handles all these.
Added base slf4j dependencies.
Added sysout-over-slf4j bridge because org.slick2d:slick2d-core:1.0.1 prints to java.lang.System#out

See org.newdawn.slick.util.DefaultLogSystem what.the.fuck.
Wiring up SLF4J bridge.

See: http://projects.lidalia.org.uk/sysout-over-slf4j/quickstart.html
Replaced uses of System.out.println(); and e.printStackTrace(); with SLF4J.

double.what.the.fuck.
Fix for erroneous warning when mvn dependency:analyze is run
Merge branch 'feature/slf4j' into develop
Fixed typos.