This fixes a regression where last line of a long label is not drawn

The bug can be triggered by having the alignment being
TTTAttributedLabelVerticalAlignmentTop and lineHeightMultiple being
greater than 1 (1.03, for example). Matt's old code handled this well,
but a641a21fa146542585e15e3ea3a7f133bee31c8d broke it.
Merge pull request #102 from scottliu1234/master

Fixed a regression caused by a641a21fa146542585e15e3ea3a7f133bee31c8d that makes a long, top aligned label sometimes not draw the last line
Fixed a crash caused by loading TTTAttributedLabel from a UIStoryboard

When TTTAttributedLabel is set as the class for a UIView used in a
UIStoryboard it will be created without a textColor. This will cause a
crash when text is assigned to the label because
NSAttributedStringAttributesFromLabel() attempts to assign a nil
CGColor to the attribute dictionary. TTTAttributedLabel now defaults to
black if no textColor has been set.
Code refactoring and reformatting
Editing and reformatting comments
Bumping tag to 1.2.2
First pass at converting codebase to ARC
Fixing podspec
[Issue #106] Add note in documentation about how text and paragraph style properties apply to passed strings, but not attributed strings
Merge pull request #104 from mattt/experimental-arc

Add ARC Support
- use `copy` mem mgmt hint
Show active link appearance.

Shows active and inactive link states based on user interaction.
Also extends to the example project to demo TTTAttributedLabel
when used outside of a UITableView.
Changing #pragma mark label
Minor refactoring, reformatting, & renaming

Using dispatch_once for singleton function pattern
Bumpgin podspec to 1.3.0
Merge pull request #107 from cbess/patch-1

- use `copy` mem prop attribute
Setting paragraph line spacing adjustment in NSAttributedStringAttributesFromLabel
Tweaked podspec file a bit
Another podspec tweak (use https instead of git to pass validation)
Use -[NSRegularExpression matchesInString:options:range:] instead of enumerating/pushing matches onto a mutable array.