Add CommentsByAccount and LinksByAccount.
promotions: Separate admin view of /promoted/graph

Make the admin view of /promoted/analytics distinct
from the non-admin view
promotecontroller: Clean up imports
promotecontroller: Automated whitespace cleanup
Middleware: Replace pylons.Response with raw WSGI.

pylons.Response is deprecated and we're not really using its
capabilities here anyway.
Toolbar: replace pylons.Response usage with simple abort.
Remove remaining (unused) imports of pylons.Response.
Replace c.response with pylons.response.

pylons.response is its own StackedObjectProxy and returning response
objects from controllers is deprecated so returning c.response is bad.

In many cases, this transition just involves returning content from the
controller directly rather than doing c.response.content = ___. This
will make the transition to Pylons 0.9.7 easier because WebOb's response
object doesn't have a content property and works differently.