implemented the filter btn and search

Please review here http://mashcode.github.io/NYCdaycare/

Would have preferred to pull the search field out of the map altogether and bring it into the UI but couldn't figure out the correct .js routine to deliver that one. There is a [_submit] event available and a way to set search boundaries if someone wants to take a crack at it. Boundaries should improve search results. Search hints is another good way to prevent errors.

The filter view needs iterating.