make models extensible we want to modify from the Moderation mod
PULL UP: removing the video fixture - no more ExternalVideo for now
app: make posts path_findable

We are using path finder on posts from the moderation mod
PULL UP:empty conditions for a path should be nil not "()"

this way we prevent a sql error and get what we want.
search_filter: allow search conditions without values
path_finder: add_flow_constraint to build SearchFilters for deleted
post and page now both have deleted? and deleted_changed?
posts: added flow setter so we can delete posts just like pages
page sidebar: refactor the link lists with partials and collections
posts: make the whole text td shy_parent for edit button

this way it will be displayed when you hover over the region not just when hovering over the text hight which can be very small
routes: forbid name posts - want to use it in moderation routes

We need nested routes to moderated_flags for a post there.
Using page/2/post/4/moderated_flag/6 would be too deep nested
Using admin/post/3/... is not appropriate as this is for non admin usage
use present? instead of any? which only works on collections
bundle: updating to recent version of debugger to fix travis
test empty page list in me pages view
fix cg:test:update_fixtures task and ran it

Now this also removes page_terms of pages that were removed.
Merge pull request #99 from azul/mergeback/cc.net

Mergeback/cc.net
theming: allow referring to themes by symbols
may_message? to access control messaging

We want to disable this in connecting classrooms