removed unused files
removed old references to accelservice and wifigpslocationservice from the manifest
changed accelservice to use org.ohmage as the package name
fixed #13. changed wifigps to use org.ohmage as the package name. Due to the package rename, AccelService 2.9 or greater and WiFiGPSLocation 3.14 or greater is required.
removed references to setting the username since it can now access the ohmage account on the phone.

One optimization that could be done would be to ask for aggregate data from the server when the app is first installed. Some changes need to be made to the performance of the server before this can be done.
updated log level to make things easier to read in LogProbe
fixed bug when creating the WIFI_HISTORY string
changed mobility error notification to show the mobility control page
added check to see if wifi scan object is empty