Updated the sample app for Xcode 6
More cleanup & deleted unneeded files
Serializing transaction madeOn properly, also added a Transaction cell to the demo
Fix typo in dateFromYMDString: documentation
Moved the empty controller in the storyboard in a row with the others
Merge pull request #13 from nemesis/xcode-6

Updated the sample app for Xcode 6, serializing Transaction#madeOn properly, added custom transaction cell to the demo app