FileHandle.moveTo() Update

delete() only deletes files and empty directories.  As such, moveTo() would leave the old directory after a moveTo() opperation.  By adding deleteDirectory(), this ensures the old copy is removed.  Not sure if the test "if (exists () && isDirectory())" is needed.
Merge pull request #464 from Psyfire/patch-1

FileHandle.moveTo() Update
Fix compile error on GWT, sorry!
Merge pull request #466 from ttencate/master

Fix compile error on GWT, sorry!
Remove the / in the beginning of the texture's filename while loading a model
Merge pull request #467 from exidl/master

G3DModelLoader puts a '/' in front of the texture's name
Merge branch 'master' of https://github.com/libgdx/libgdx into bullet2
Merge pull request #468 from xoppa/bullet2

Bullet, update to 2.81
more changes to basic3dtest
Merge branch 'master' of https://github.com/libgdx/libgdx
Mesh set* chaining

This change makes working with static Mesh objects much, much prettier.

The pattern is used by Wicket and parts of libGDX already
Merge pull request #470 from g-pechorin/patch-1

Mesh set* chaining
Fixed RunnableAction resetting from without the runnable.
Fixed copy/paste on OSX.
Merge branch 'master' of https://github.com/libgdx/libgdx into bullet2
btSoftBody: Add MeshPart support and extract points
Remove unimplemented code
Swig generated files
Update the bullet tests