Mountmaster

inventoryCtrl: Changed Matt to show 90 mounts instead of 180
notificationCtrl: added mountmaster achievement test
userCtrl: added scope.profile.mountCount
user.js: added fields for mountMaster and mountMasterCount (not used yet),  mountCount function
modals/achievements.jade - added modal dialog for mountmaster (note: wolf graphic was not available locally)
profiles/achievements - jade  - mountmaster added
stats.jade -- uncommented broken Mounts Tamed section, since it works now
(Needs habitrpg-shared: #348 to work)
PS. Pay no attention to the 'Revert Bailey' things in the commits - I doubleclicked something I shouldn't and can't get rid of them.
Yup!   I did a lot of source code delving to figure out where things were.