fix animation clear
modify bone transform
add text type
Merge branch 'refactoring' of https://github.com/DragonBones/DragonBonesCPP into refactoring
Merge branch 'refactoring' of https://github.com/DragonBones/DragonBonesCPP into refactoring
Merge pull request #63 from lite3/refactoring

fix some bug and add some method
Merge branch 'refactoring' of https://github.com/DragonBones/DragonBonesCPP into refactoring
fix typo
fix timeline key frame update delay bug
fix color transform animation bug
add textdata scale9grid data
fix color transform animation bug