Load creature sounds when transforming

Closes #354
Default value for Avatar::loadSounds() param
Merge remote-tracking branch 'upstream/master' into bugfixes
Merge remote-tracking branch 'upstream/master' into bugfixes

Conflicts:
	src/Avatar.cpp
Merge remote-tracking branch 'upstream/master' into bugfixes
Merge pull request #372 from dorkster/bugfixes

Load creature sounds when transforming