Merge pull request #490 from bergerkiller/master

Made task handling part of the multitasker class itself
Retry file write when a ClosedByInterruptException is thrown
More protection for ClosedByInterruptException
more ClosedByInterruptException handling
Added delete method to SimpleRegionFile
Missing method
Add InputExecutor to execute input each frame
BAAWrapper fix - also LFCR issue
Added custom view volumns for observers
Added support for entire Region BiomeManagers
- WrappedBiomeManagers wrap a 16x16 array of chunk BiomeManagers
- Fixed a bug with CuboidBuffers
Added a SetQueue for handling Dirty queues
Headers
Changed PluginDescriptionFile to use YamlConfiguration instead of
directly using snakeyaml.
Added YamlConfiguration(Reader) constructor.
Allow custom exception handlers
Updated javadocs
BlockMaterials have high friction/no energy.

- By default, can be changed.
Signed-off-by: Chris Sanders <zidane@outlook.com>
Reduced initial capacity of TByteShortByteKeyedObjectHashMap and added compact method
Added convenience methods for use of snapshot lock
Add methods to check if lin/ang velocity is dirty.
Signed-off-by: Chris Sanders <zidane@outlook.com>
Don't allow setting empty itemstacks, default to null