2 changes:
1 - placed code for clicking filters in document.ready instead of
 in displayObjects(). When it was in displayObjects, it kept reloading filteredObjects
 (see gif I sent), but it no longer does.
2 - changed '!=' in setURLParameter to '!==' since it is more strict.
Merge pull request #2 from gruiz17/master

2 changes: bugfix for filter clicking, double equal fix