added ability to dismiss keyboard in sign-in screen and automatic sig…

…n-out when google auth refresh token is expired

added google+ sign-in back as alternate option to username/password. …

…updated bundle ID to "-internal" for enterprise build and updated URL types and google client ID to match. updated scheme provenance to get app version from bundle. updated crashlytics.

removed/re-added Crashlytics and Fabric frameworks per solution poste…

…d online. seems to be working.

fixed DSU iOS 7 bug (NSURLSessionConfiguration::backgroundSessionConf…

…igurationWithIdentifier: was renamed in iOS 8).