iOS background sync fixes + load screen

Changelog:

• Convert NSLog statements from the communication code to NotificationHelper so that we can see them in our logs
• Fix iOS background sync by using the Bolts framework to launch all the sync operations in parallel
• Change all calls to backgroundSync to use new BFTask instead. This allows us to correctly mark tasks as done.
• Change some stat values on ios to reflect real values
• Change the javascript calls to get and set personal data to also go through native code. This fixes the token refresh issue on iOS, and also
• Initialize android usercache on startup so that we can avoid the javascript usercache table not found error
• Move the server sync init code to pluginInitialize
• Move the startupInit code on android to the plugin initialize instead
• Attempt to improve WSOD issues by delaying bootstrap until the device is ready and removing all resolve dependencies on the root
• Fix android issue with re-initializing the finite state machine on launch
• Handle re-initializing the FSM on upgrades
• Minor logging fix to show the length of the point arrays instead of the points since they are not human readable
• Use the correct directory for the log on iOS so that we can now get emailed bug reports on iOS as well
• Turn on loading messages for various stages of the diary