Add extra methods to create constraints based on CGSize
Merge pull request #11 from bartvandendriessche/feature/extra_cgsize_methods

Add extra methods to create constraints based on CGSize
Added methods to constrain just the width or height
Merge pull request #13 from kgn/master

Added methods to constrain just the width or height
Added support for layout guides in iOS7
Update README.md
Update spec for 0.0.7
Corrected passing of incorrect edge parameter
Wrapped any layout guide references in an #ifdef __IPHONE_7_0 to prevent iOS 6 SDK compile errors
Pod spec version to 0.0.8
Added __unused to xValid, yValid and superview in 2 methods to prevent compile time warnings when building for release. This is due to NSAsserts being stripped out in release mode.
Merge pull request #14 from rhodgkins/master

iOS 6.1 SDK fix
instancetype, removed unneeded asserts
More robotty
Remove inaccurate XCode copyright claim from UIView+AutoLayout.m 

See https://github.com/jrturton/UIView-Autolayout/issues/15 for details
Remove inaccurate XCode copyright claim from UIView+AutoLayout.h

See https://github.com/jrturton/UIView-Autolayout/issues/15 for details
Merge pull request #16 from cschneid/master

Remove contradictory license information from headers of Files.
Added space on axis method using intrinsic size
Podspec to 0.0.9
added -(NSLayoutConstraint *)pinAttribute:(NSLayoutAttribute)attribute toSameAttributeOfItem:(id)peerItem