Version 1.6, fixes bugs

bug fixes + release 1.6

- fix #20
- try to fix #19
- update download messages

Version 1.5, supports OS X El Capitan

v1.5

Merge branch 'ling32945-master'

Version 1.4, now supports Xcode 7 beta

v1.4

release 1.4, now works with Xcode 7 beta