Ensure tintColorDidChange restores the original attributes for each unique link
Merge upstream into master to support UIAccessibility
Remove minimum and maximum line height that broke size calcs
Added optional tap target (triggered when not tapping any active link)
Fixed iOS 8 warnings
Commented out tintColorDidChange implementation (it causes undesired variations in intrinsicContentSize)
Merge remote-tracking branch 'evrst/everest' into bugfix

Conflicts:
	TTTAttributedLabel/TTTAttributedLabel.m