Move require of dependencies to fix bin/rails
Rename session_notes_wiki_url_format to session_notes_url_format

Session notes may be hosted on something like Etherpad, instead of 
always on a wiki.
Only require acceptance of agreement one is set
Ensure proposal audience levels have been set before transforming them
Add open_conference_ware:install generator

Installs initializer into the host app to configure OCW's settings
Move creating of development users into db/seeds.rb
Set up the host app to load OCW's seeds, via install generator
Add Snippet.load_from_fixtures, to load without overwriting
Add snippet loading to db/seeds
Move rake task to reload snippets into its own file
Refactor setup rake task to use db:seed

Remove outdated setup:sample task
Remove the install:migrations rake task

We're automatically appending our migrations to the host app, to allow
for easier iteration.
Move export rake tasks from bridgepdx to export
Update audio.rake to use OpenConferenceWare namespace
Update mediawiki-related rake tasks, move to own file
Enforce available locales in dummy app to avoid deprecation warning
Use a OmniAuth::Builder subclass to collect loaded providers
Don't require openid and persona OmniAuth providers

Users can add and configure them in the host app
Load and retain seed data when running tests
Add mount_point to generated initializer, default to root