Fixed Proposal::to_icalendar syntax warning.
Added 2011 event settings.
Updated bridgepdx theme's proposal submission date to March 16th.
Updated organization name in footer of bridgepdx layout.
[migration] Added audio_url to proposals
Added audio.js (http://kolber.github.com/audiojs/) and embedded an audio player on session pages where an audio_url is present
Added admin-only editing of session audio urls
Fix proposals/show to fix blank checking.
Add `add_id3_tags_to_mp3` script.
Improve `add_id3_tags_to_mp3` with more fields, etc.

* Added more ID3 fields.
* Eliminated unnecessary "if" blocks by just doing a "next" earlier.
* Require environment libraries more clearly.
Add `rake rake audio:link` task for linking audio files to their sessions.
Merge branch 'with_session_audio'

* with_session_audio:
  Add `rake rake audio:link` task for linking audio files to their sessions.
  Improve `add_id3_tags_to_mp3` with more fields, etc.
  Add `add_id3_tags_to_mp3` script.
  Fix proposals/show to fix blank checking.
  Added admin-only editing of session audio urls
  Added audio.js (http://kolber.github.com/audiojs/) and embedded an audio player on session pages where an audio_url is present
  [migration] Added audio_url to proposals
Move session audio player towards top of the page for greater visibility.
Improve `rake audio:link` to URI escape paths, e.g. cope with spaces.
Relax restrictions on commenting.

Previously, it wouldn't let the person that submitted the proposal leave
a comment on their own proposal, and wouldn't let a person that just
submitted a comment do so again. Unfortunately, allowing these is useful
for people to leave us comments or leave another comment if they realized
they forgot to mention something.
MIGRATION: Add users selector column.
MIGRATION: Add selector_votes table.
Update `rake annotate_models` information.
Add SelectorVote, which lets selectors vote and comment on proposals.
Give selection committee members access to the Proposal@note_to_organizers on the proposals/show view