Store the current time, updated per frame refresh, in Ovale.now.

Store the current time, updated per frame refresh, in Ovale.now.

Change the modules that update based on live events to use Ovale.now
instead of OvaleState.maintenant.  Ovale.now tracks the actual current
time.  OvaleState.maintenant tracks the time of the simulation which can
lag behind due to the update interval set in the options.

git-svn-id: svn://svn.curseforge.net/wow/ovale/mainline/trunk@758 d5049fe3-3747-40f7-a4b5-f36d6801af5f