it can happen that the http referer is nil when we expect it to be set (for example if the user has a privacy extension enabled

total refactor of version header. X-Git-Update: ISO 8601 formated date of the last commit, X-Git-Revision: sha1 hash of the last commit

Fix spec failure related to presence of app config settings. Also, you can't test application controller directly.

move i18n.loadLocale to the application template, remove localize controller & helper, renamed localize to get_javascript_strings_for and added it to the application helper

everything ported from pre-mysql mobile stuff.  things missing: search page, aspect switcher, notification badge.