add NSAttributedString attributes support for links, support UIColor (not just for Foreground)
add NSAttributedString attributes support for links, support UIColor (not just for Foreground)

zhwcoder/TTTAttributedLabel,zilanfeng/TTTAttributedLabel,hoaquo/TTTAttributedLabel,Akylas/TTTAttributedLabel,yaoxiaoyong/TTTAttributedLabel,TTTAttributedLabel/TTTAttributedLabel,mattt/TTTAttributedLabel,Voxer/TTTAttributedLabel,KILLI/TTTAttributedLabel,NewAmsterdamLabs/TTTAttributedLabel,XZwalk/TTTAttributedLabel,rtsbtx/TTTAttributedLabel,SampleLiao/TTTAttributedLabel,buiminhhuy/TTTAttributedLabel