Don't do duplicate queries

Fixes a bug where initial query wasn't happening
Fix a bug with search

This fixes two issues:

Previously the query string was driving the search, which meant that
removing something didn't cause a reset.

We didn't support 'clearing' values at all. Now we send a 'null' value
to indicate a clear request.
Created prototype template for bulk uploader
Removed some unnecessary whitespace in the admin css file
Merge pull request #202 from ahinz/topic/fix-search

Topic/fix search
Merge pull request #201 from azavea/topic/templates

Prototype template for bulk uploader
Merge branch 'master' of github.com:azavea/OTM2