set segue names from runtime attributes

This allows you to set a value on the Controller called “segueNames” of
type “string” which is a comma separated list of the segue names you
want to put inside the segmented controller.

In other words it replaces the call to `addStoryboardSegments:` with a
property defined on the view controller in the storyboard.
Merge https://github.com/Scott90/SDCSegmentedViewController
removed setter

Everything is done in the loadView
removed property
set up segues in awakeFromNib
Update for formatting consistency
Merge branch 'Omnityke-master'