bug1056857-Part 1: added developer checkbox for ignoring GPS. r=ehung

This is just the GUI side, the other parts of this bug are implementation of this.
Bug 990047 - Add a shared function to load JSON files and use it throughout gaia to replace the existing ad-hoc functions
Bug 1061042 - Add the icon for EU roaming
Bug 1061658 - [Costcontrol]Datalimit is in Red color and Done button is disabled
Bug 1056969 - New data/roaming alignment
Bug 1023664 - Calendar modularization part 1
Bug 1048869 - Autopredict algorithm should value vertical alignment of keys more
Bug 1061149 - Fix incoming but not missed calls having their numbers displayed in red on call info page. r=Rik
Bug 1049916 - Create Firefox Accounts smoke tests to validate user authentication re=_6a68
Bug 1062007 - "Developer HUD" header is not localized anymore
Bug 1061439 - Part I, Create KeyboardConsole and add log to interactions
Bug 1061439 - Part II, properly handle JS error in latin.js promises
Bug 1061439 - Part III, Stop JS error by preventing IMEngine from interact with Glue
Bug 1061448 - Correct the match of property names and field names
Bug 1061450 - Use customized dialog for delete APN waring
Bug 1059053 - [Messages][SMS] Icon in Message report is truncated
Bug 1062197 - Fix hardcoded strings in Messaging settings
Bug 1061391 - Remove the button of clear browsing data
Bug 1059106 - [settings] move root panel airplane mode item into panels/root
Bug 1060358 - Investigate failure in test_settings_change_language_rtl.py