* Use object rather than id
Don't hide the Persona login options by default

This effectively reverts commit d365bc779a63c1ea3ed9d72fd1f9e2de1eef4028
as well as the equivalent for the "Forgotten Password" page.

The Login page no longer flickers for users that have Javascript
enabled. The downside is that NoScript users will get a Persona
login button that they can't use given its dependency on Javascript.
Use the new Persona.org URLs to avoid unnecessary redirects
 * Remove unnecessary function from schedule models
 * Order rooms on exclusive events by overflow to ensure primary room is first in list
 * Move /schedule/table_raw.mako to /raw.mako and remove duplicate table information
 * Add conditional inheritance in /table.mako dependent on c.raw
 * Show video/slide/audio URL's on schedule table
 * Add New and Edit links for Locations
 * Remove duplicate code in table.mako
 * Use time.min and time.max rather than static time definitions
Prefetch the Persona Javascript on every page if needed
Replace the Persona PNG button with CSS
Merge pull request #175 from iseppi/schedule-fixup

Various fixups to schedule
Merge pull request #176 from fmarier/persona-speedup

Persona speedup
Merge pull request #177 from iseppi/miniconf-review

 * Use object rather than id for Reviewer
country validation: limit to list
RT#291 URL sanity check validation
Re-include sqlalchemy.convert_unicode
correct trivial capitalisation
LCA2013 logos
clean gap on registration form
Merge pull request #178 from iseppi/elena-merge

Merge Changes from Elena
 * Remove initial database load code from initial alembic revision and instead call zk.model.setup() from alembic
 * Add second revision of DB schema to bring the model up to date
Merge pull request #179 from iseppi/alembic-fixup

Alembic fixup
 * Re-add necessary default configuration to development.ini.sample
 * Now that we are using the URL validator, allow NULL on proposal URL columns
Merge pull request #180 from iseppi/proposal-fixup

Make sure proposal submissions work on a default install