Updates based on changes to iOS SDK
Ignore xccheckout file
[thread] Support for flexible width devices
[compose] Update for iOS 8 - strange layout issues
[sync] SDK now officially supports lastAccesssedAt
[xib] Update all XIB files for Xcode 6
[status-bar] Hide/show animation causes content shift on iOS 8. Revisit Later.
[extensions] Remove iOS extension prototype
[screenshots] Adding screenshots