import podspec
handle the case when one of the superviews is nil (i.e. we're working on the top view)
support the none attribute; replace exceptions with asserts
Merge branch 'negativeconstants'
Conforming code to style, removing assert that will never be false

- All other if statements have curly braces
- If the regex is successfully matched, the NSAssert will never be false
- Adding '-' to documentation
Breaking out common regex constructs

Attempting to make regexes more generally readable
Adding labels to regex group indexes
Breaking out UIView -buildConstraint:with:

I find having a constraint building method very helpful, so I can manage the constraints myself.
Adding UIView -buildConstraint:with:priority:
Merge pull request #3 from blast-hardcheese/master

Breaking out common regex components, hopefully improving readability