We don't need an old version of Rubygems now we're on Rails 3

Revert "automatically use the correct version of rubygems (1.6.2) in rvmrc"

This reverts commit dc2bab9bddc08316fe6d92674aeb02777fc2b3be.
We don't need an old version of Rubygems so hopefully we don't need to do this
Remove debugging output that was causing migration to fail
Update syntax while I'm here
Fixtures is namespaced in ActiveRecord now
Workaround a Postgres connection error we are getting under Rails 3.1