Fix bad ARC auto-conversion choices. SFCellData needs to retain these objects.
Added method for setting buiguideId on SFLegislatorSegmentedViewController so it can trigger the network request after the view has loaded. Should make transition from SFLegislatorTableViewController and SFBillDetailViewController (sponsor) faster, but show loading view on the SFLegislatorDetailView.
Improvement to build numbering. No more Congress-Info.plist updates. Congress.xcodeproj script generates simple buildnumber.xcconfig file that contains BUILD_NUMBER var, which gets ingested by the xcconfig files for the various build types. boom.