Merge branch 'dev'
PB.$ - find and childeren methods now return null when no are elements found.
Added `grunt watch` :)
Source push
Source push
Merge branch 'dev' of https://github.com/Saartje87/pbjs-0.6 into dev
Changed git@... to https
Merge branch 'dev' of github.com:Saartje87/pbjs-0.6 into dev
Added serializeForm method
Dist push
Reset length of set when calling remove
Closest should return PB.$ object
Trimmed whitespaces
Fixed bug where emptied set still had a length
Updated method comments
Merge branch 'dev' of github.com:Saartje87/pbjs-0.6 into dev

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Implemention of PB.Queue and PB.$.fn.transition (replaces morph method)
Dist update
Renamed requestXMLHttpRequest to supportXMLHttpRequest
Second argument to find method so it can return null if specified to do so.