Don't trust prepare statement to exist just because we have the same connection object
Log a warning if our connection has reconnected behind our backs
Minor cleanup, and use a more standard event name when logging re-prepares.
Update changelog.
For safety, don't use prepared statements inside transactions.
Fix an intermittent spec failure.
Bump version to 0.7.1.
Additional sanity check for a new spec.
Merge branch 'master' into experimental

Conflicts:
	CHANGELOG.md
	lib/que/adapters/base.rb