Allow Label to wrap at specified characters

This commit provides the option to specify additional break characters.
CpuSpriteBatch - fix #2630
Merge pull request #2674 from vmilea/cpubatch

CpuSpriteBatch - fix #2630
Add gimpact collision wrapper, closes #2619
Swig generated files
Add bullet GimpactTest
Add a note to changes for Gimpact and stb_image
The world isn't ready for 2.7.0
Update DependencyBank.java
ParticleEditor: relative path for emitter's image

If image for emitter is located in the same directory as effect file, or in a subdirectory, then path to this image will be saved as relative to the effect file
Check isBreakChar in getWrappedBounds
Merge pull request #2492 from jpilfold/master

Allow Label to wrap at hyphens
Merge pull request #2679 from alex-dorokhov/particle-editor-relative-path

ParticleEditor: relative path for emitter's image