Add documentation for error responses. Fix #329
Add created_at to json responses for tasks, users, photos, field_reports
Disable autocomplete for password fields and apparently, this also blocks the enter button
Encapsulate the logout method into a static method on the main activity
When there's an error, check the status code and log out if we get back a 403
Remove uncompiled facebook sdk
Facebook sdk is now on maven so we don't have to include it as a library
Merge pull request #332 from calblueprint/mark/docs/errors

Add documentation for error responses. Fix #329
Merge pull request #335 from calblueprint/mark/android/log-user-out

If a user receives a 403, log them out and take them to the landing page activity screen
Merge pull request #333 from calblueprint/mark/api/created-at-dates

Add created_at to json responses for tasks, users, photos, field_reports
Merge pull request #334 from calblueprint/mark/android/fix-password-fields

Fix Password Fields
Merge pull request #337 from calblueprint/mark/android/remove-fb-sdk

Remove Facebook as a library, add as a dependency
Add ping endpoint for new relic. Fix #338
Merge pull request #340 from calblueprint/mark/api/ping

Add ping endpoint for new relic. Fix #338
fix merge conflicts