Merge pull request #22 from bobbyren/settings

Settings
introViewController confirmation alpha fixed; added HUDs for login/signup; added timeout failures
when saving a new practice, displays progress HUD and dismisses when done
fixed hud mode in intro; edit practice date selects first field immediately; clicking email also performs a save

fixed enable boolean
deleteing a practice or member has an animation to remove row; keyboardDoneButtonViews have white text