Fix posts time shifts.

If system's time zone != rails time zone (default utc) then continuously saving a post shifts it's creation time by the time zone difference.

This initializes Chronic timezone to Rails config.
Unify atom links on index page and atom itself.

The atom link on the html index (without tag) is "url/posts.atom" while on the atom feed the self link was "url/.atom".

This commit copies the url statement from index to atom feed.
Merge branch 'unify-atom-links' of https://github.com/amw/enki
Merge branch 'fix-time-shifts' of https://github.com/amw/enki
Merge branch 'remove-admin-tags' of https://github.com/gaelian/enki
Remove the admin tags feature now that admin/tags is gone
Load jquery unobtrusive js driver.

At least one ujs driver needs to be loaded if enki is to be used with Rails 3. Since Prototype is not included in any layout I'm adding Jquery that is used everywhere in Enki.

Without this driver things like the Logout button in Admin panel did not work. It was pointing to GET admin_session_url instead of
DELETE admin_session_url.

The driver required jquery update.
Don't send exception notifications on InvalidAuthenticityToken
Nicer default layout, thanks to Mark Gandolfo.
Fix will_paginate dep, pre versions are screwing up with ~>
Fix for the bundler/psych cock up on 1.9.2p136
Comment the psych hack
Remove reference to enki-translator, I don't support it anymore
fix spec about /pages request. Closes #6. Closes #24.
Update gems, primarily for rails 3.0.4
Send csrf-token with AJAX requests now that rails doesn't make an exception for XHR in 3.0.4.

Fixes #27.
Unit test coverage for Comment#requires_openid_authentication?
Comment with a nil author does not require openid authentication. Fixes #32.
Migration to add indexes to slug columns, since they are used on page and post show.
Allow single component domains (such as localhost) to be recognized as OpenID identities.