Create placeholders for UAPushNotificationDelegate methods.
Make SFImageButton intrinsicContentSize calculated off the imageView's intrinsicContentSize. Adjust the map expandobutton to compensate.
Fix app url for legislators. SFViewDeckController was loading the wrong vc: corrected to SFLegislatorSegmentedViewController. Dealt with some chicken-egg issues on setting legislator in both legislator vcs where they were being asked to layout elements before they had been placed in the view hierarchy. This closes #360.