improve Color Class
check
Big upgrade Color class

Added RGBA8888 logic for hex String of Color.
Added fromString() and fromDec() methods for generate new Color object.
Added tests for new functions.
Added SkeletonData Core Values import from json

Added test.
Added name, version, width, height.
Some fixes
Fix and optimize some methods, fix new approach to add new bone in bones

Optimize findBone and findBoneIndex
fix gitignore
fix return null to -1 for findBoneIndex
cleanup from binary data and export data
Merge branch 'feature/update-slot' into feature/update-version
Update SlotData

Fix r,g,b,a to Color Object
Some fixes and test
Merge branch 'feature/update-slot' into feature/update-version
added bone test
added IkconstraintsData entity
added IkConstraint basic
find bugs in TextureAtlas: size entity in Atlas
find bugs in TextureAtlas: size entity in Atlas
Merge branch 'feature/rush' into feature/update-version