Add corresponding `highlighted` properties for shadowColor, shadowOffset, and shadowRadius
Correcting documentation about text properties
Refactoring implementation of -linkAtCharacterIndex:
[Issue #164] Setting default line break mode for link attributes to word wrap
[Issue #163] Completing implementation of NSCoding
[Issue #149] Adjusting pen offset on last line to fix position of truncation token

Signed-off-by: Mattt Thompson <m@mattt.me>
Bumping version to 1.6.0
[Issue #180] Updating documentation for lineHeightMultiple
Switching singleton implementation to use dispatch_once
[Issue 176] Removing non-object values from string attributes in order to prevent exceptions in NSCoding

Signed-off-by: Mattt Thompson <m@mattt.me>
Documenting NSCoding behavior for iOS < 6
Bumping version to 1.6.1
[Issue #186] Enmerate links in reverse so recently-added links have preference
Merge remote-tracking branch 'refs/remotes/mattt/master'

Conflicts:
	TTTAttributedLabel/TTTAttributedLabel.m