added support for setting ttributedText directly
added support for setting ttributedText directly

ChetanGandhi/RQShineLabel,zipme/RQShineLabel,mobitar/RQShineLabel,KaiZhang890/RQShineLabel,ysfox/RQShineLabel,kolyvan/RQShineLabel,maxkonovalov/RQShineLabel,tranthanhvu/RQShineLabel