Merge branch 'release/1.5.3'

* release/1.5.3:
  Make version string less prominent
  Revert to XCode 5; fix warnings
  Fix misplacements in autolayout
  View storyboard as larger screen size
  View storyboard as iOS 7 and later
  Align top of calendar to *top* of guide then month headers align right??!?
  Update storyboard to latest XCode
  Add calendar images to assets
  Update submodules
  Remove compiler warnings about signedness
  Add view{Did,Will}Appear calls to superclasses where missing
  Remove TestFlight
  Allow deletion of work type and work detail.  Resolves hughescr/Timesheets#13
  TestFlight path relative to project, not absolute
  Add TestFlight 2.2.1 and libTestFlight.a