Update to wpxmlrpc 0.5 and start using streaming request on uploading media.
Merge branch 'develop' into feature/Update-XMLRPC-Version
Merge pull request #2722 from wordpress-mobile/feature/Update-XMLRPC-Version

Feature/update xmlrpc version
Remove UITests build from the Stats Widget scheme.
Update WordPressAPI dependency to tag 0.2.0
Update profiles for build.
Update travis file to use xcode61 and remove no longer necessary pin to ruby 1.9
Enable email notifications on travis build.
Force use of SDK version 8.1 on Travis.
Merge remote-tracking branch 'origin/develop' into issue/2661-notification-comments-rich-text-support