upgraded rails to 3.0.19 to address zero day vulnerability

added note about bug in SessionsController#create_group

Allow all methods in CORS

improved grouping UI -- list of groupables now follows scrolling and groupables in a group are now highlighted when hovering over the group

Application.js now passes jshint

improved dealing with RollcallXMPP plugin during initial setup

default databaseusername for dev env is now 'root'

fixed validation message for account associated with user

better error message for login uniqueness validation

fix initial admin account creation for real this time

add domains to admin_jid examples

skip account validation when creating first admin account

Merge branch 'master' of github.com:educoder/rollcall

replaced old prosody/ejabberd/openfire plugins with new xmpp adhoc admin plugin

slightly better error message when associated account validation failes in account_mixin