Bump minimum required WP version to 3.6(.1) because we need heartbeat
Load front-end JS file everywhere now

Except when in wp-admin.
Enqueue front-end JS file
Interim commit with front-end JS refactor to pass JSLint
Minor phpdoc grammer improvement
Optimisation: don't load admin files when DOING_AJAX
Interim commit with second pass of front-end JS heartbeat implementation
Third pass at notifications heartbeat; this time, the PHP that returns info about achievements
Clear all notifications before our heart beats back
Heartbeat now takes care of clearing any pending notifications.
Trying to resolve a merge conflict
Merge branch 'heartbeat'
Merge branch 'master' of github.com:paulgibbs/achievements