Adds 'add products' button.

Also gets rid of defaul 'rokkit' font for .btn-primary.
Gets rid of defaul 'rokkit' font for .btn-primary.
Load create-collection importers from separate template
Load create-collection importers from separate template
Merge branch 'master' into edit-coll

Conflicts:
	totalimpactwebapp/static/css/main.css
Add import-products modal to report.html
add-products modal drop down correctly, looks right.
import-products modal resets when you dismiss it.
On report add-products modal, loading gif works for Get 'Em button.
go-button makes update or create call depending on class setting.
go-button uses old Coll in global namespace for update, make a new one for create.
Upload-products button displays failure modal if user not logged in.

Also condenses json and csv buttons into a 'download' button. I think
some folks don't know what json or csv are.
Report getting-metrics spinner gif keeps going until we get a 200 response.

Fixes issue #13
More informative assets_debug documentation in __init__.py