Remove unused code

Clean syntax.
Upgrades Coderay to 1.0 series
Centers the setup
Fixes article list display
Removes dead links from the default sidebar
Fixes formating on the default theme comment form
Upgrades to Bootstrap 2.2.2
Gives the comment listing some love.
Really use flickraw-cached.

The way the Gemfile was changed after
4deb03f7f698dfe6a308dc301515a2dffc16bca1 caused flickraw (non-cached)
to be loaded instead. This is one of the two way to straighten this,
the alternative is to just require flickraw. Either seem to work.
flickr: sanitize handling of API keys and secrets.

The simple API key is not enough anymore to fetch Flickr images, the
shared secret is needed as well. Since this is a secret, it can't be
stored in the GIT repository, so instead require a configuration on
the initializer itself.

Possibly, this should be configured at runtime like it's done for
Akismet.
Fixes a visual bug in admin / content listing
Merge pull request #122 from Flameeyes/master

Flickr fixes and improvements. Tested and specs pass like a charm.
Fixes the links on the dashboard according to the profiles. This commit solves issue #123
Merge pull request #119 from slainer68/master

Don't initialize when compiling assets to avoid exception on Heroku
Fixes upload form
Merge branch 'master' of github.com:fdv/typo
Fixing failing test on postgresql
Merge remote-tracking branch 'fdv/master'