working on multithreading
Reworked greedy meshing
Added shadow quality setting
Got some weird bugs and glitches :/
removed warning
seed random again
some minor work
Merge branch 'develop' of https://github.com/Dakror/Vloxlands.git into
develop

Conflicts:
	core/src/de/dakror/vloxlands/Vloxlands.java
	core/src/de/dakror/vloxlands/layer/GameLayer.java
minor glitch fixes
removed .update method
worldgen fix
Hack-fixed libgdx-internal NPE and readded .update
Fixed strange Human position
Entities are based on islands now too
Merge branch 'develop'