Change Behavior of Live Search Input

When you click on the tag icon next to the Live Search Input box it now
stops jquery.livefilter.js from working.  Added variable to
initLiveSearch and modified liveFilter.js to accept a destroy option.
Match Input to known list of tags than Ajax

Send javascript an array of known media tags so that we can match that
to what is entered into the input box.  Then we send the request for
media tag that has been matched back to server and respond with list of
media items.
Oh yeah and I forgot to add the media tags icon to the mix on the last
commit so I added that.
Reworked Infinite scroll...

...so it would work with the change from Live Search to Media Tags
search.
Hitting enter resets query

Just a start.  Needed a way to reset the query so we can start over with
any searches.  Now if you clear the input box and hit enter on the
keyboard it sends an Ajax request resetting the query to way it was
originally
Forgot to add css changes

Wish there was some way to go back and add to commits when you forget
something.  These are just changes that are needed for icons in front of
input box and for the overlay when waiting on ajax request.