Refactor application.yml.example [ci skip]

use rails admin gem, not the smaller git repo.  NOTE: I will delete diaspora/rails_admin_smaller in about a week to let people who pulled it get off of it

This reverts commit f7d1f0d9.

- should fix a few cukes...

This re-enables 'config.assets.initialize_on_precompile' to allow the
Rails Admin assets to precompile. On Heroku deploys, this may require
the Heroku Labs 'user_env_compile' feature to be enabled, which you
should be using anyway for Asset Sync to work properly. :)

bootstrap-sass (w00t)

* Update interim-bootstrap to use the partials from bootstrap-sass,
since some of the names have been changed (and we're using the
Bootstrap 2 javascript now). This should make it easy to keep the
file up to date with the version of Bootstrap we're using.
* Use interim-bootstrap instead of bootstrap-complete in default.css to
avoid the little problem I ran into with Bootstrap + Blueprint grids
not getting along. :)
* Revert the CSS class change (from .span-24.last to .row) in
layouts/application since interim-bootstrap works around that problem.
* Get rid of .icon-black since it's not needed.
* Remove the 60px padding on the page body since it isn't needed and
causes problems with the single post view.