enabling push state, need to specify root for all cols & models; server now needs to be able to respond to corresponding urls
need to reset to first page
bug, since I already call extend
enabled pushState, anchors no longer apply
rm debug statement
changing routes to include all params (kwds, page, cats)
must respond to any sub-url to simplify things
stringify before sending to server, so that it can be parsed as json array server-side
trying to be more careful about passing objects around, and modifying them accidentally
minor changes/bugs/making trailing "/" optional