2017-09-19 Updated for Swift 4.0
2017-03-27 Updated for Swift 3.1
2016-10-27 Updated for Swift 3.0.1
2016-09-13 Updated for Swift 3.0
2016-03-21 Updated for Swift 2.2
2015-10-20 Updated for Swift 2.1
2015-09-16 Updated for Swift 2.0
2015-04-08 Updated for Swift 1.2
2014-10-16 Updated for Swift 1.1
2014-08-18 New Swift 1.0