Move music content to separate repo.
Removed old timer event classes
Merge branch 'develop' into soundtrack
Dont expose internal data in Facet interfaces
Don't crash if assets can't be reloaded/disposed properly
Dispose streaming music assets correctly
Update FPS display only twice per second
Merge branch 'develop' into soundtrack
Fix audio end listener - rewind resets limit
Fix rare bug when playing the same music asset twice
Merge remote-tracking branch 'movingblocks/develop' into soundtrack

Conflicts:
	engine/src/main/java/org/terasology/rendering/world/WorldRendererLwjgl.java
Merge PR #1344 by @msteiger - facet streamlining
Update versioneye plugin
Reimplement the purgeWorld command on top of the new auto save system.
Merge pull request #1366 from flo/purge-world

Reimplement the purgeWorld command on top of the new auto save system.
Quick fix junit test that broke with #1366
Merge PR #1365 by @msteiger - version eye update
The run key toggles now between running and walking.
Run per default, as that is what you usually want.
Chranged the run key default from "Shift" to "R".