constraint grouping prototype
Explicitly #import <Foundation/Foundation.h> instead of assuming it has already been imported.
Merge pull request #54 from SkylerLipthay/master

Explicitly #import <Foundation/Foundation.h> instead of assuming it has already been imported.
add "make.attribute(...)"
add view.mas_attribute(...)
change to and test make.attributes(...)
reimplement composite attributes based on MASAttribute
Merge pull request #55 from Ahti/master

add "make.attribute(...)"
Fixing build status image for travis ci

image now retina ready!
Merge pull request #58 from haaakon/patch-1

Fixing build status image for travis ci
Fix typo in README.
Merge pull request #60 from nickcheng/typofix

Fix typo in README.
Initial equalTo() autoboxing implementation
Default to prefixed auto-boxing macros, cleanup constraint implementations
Added back public MASConstraint constant setters, cleanup
Added doc comments for new stuff
Added tests for equalTo NSValue arguments and autoboxing
Updated example with autoboxed equalTo usage
Added mas_remakeConstraints
Added MASConstraint private header