Change logo link in base layout.
Cleanup configuration files.
Delete symfony's development files.

Apparently we're using a -DEV version of symfony, no need to
have these files in the Forge repository, though.
Upgrade to Symfony 1.2.12.
Upgrade Symfony to 1.3.11.
Upgrade Forge to work with Symfony 1.3.13.
Update Symfony plugins.
Upgrade Symfony to 1.4.20.
Upgrade Forge to work with Symfony 1.4.20.
Remove swift library require_once statements.

* Symfony handles this correctly now (through sfMailer).
* The swift library moved as part of the 1.3 upgrade.
A few more columns to sort tags by.
Use dynamic URL for search field.
Patch EpiOAuth/EpiTwitter to use Twitter API v1.1.

Changes imported from:
* https://github.com/jmathai/twitter-async
* https://github.com/kaosdynamics/Twitter
Patch Gravatar plugin to use the new (as of 2007) style URLs.

sfGravatarPlugin doesn't handle redirects well, and since 2012 the old
URLs redirect, rather than return the image as well.

Source: http://blog.gravatar.com/2012/01/26/growth-and-performance/
Add back default avatar after Gravatar plugin upgrade.
Add config for sfXSSSafePlugin.
Add sfPropelORMPlugin, disabling default sfPropelPlugin.

Upgrading Propel from 1.4 to 1.6.
Whitespace in model classes.
Add Propel 1.4 methods to call 1.6 versions in model classes.

Propel decided to add the RelatedBy sufixes in more cases (presumably
to avoid duplicate methods on the new <Object>Query classes).

Instead of adding the RelatedBy suffixes to calls in the application,
creating these wrapper methods on the model keeps the application more
readable.
New API for WidgetFormPropelChoice filtering.