Made monkey-patching easily swappable for testing purposes.
Integration tests - enqueue w/clues; work w/o it.

This covers the scenario where the enqueing ruby process is using
resque-clues and the performing ruby process is not using the
gem.
Test enque w/unpatched resque being performed by patched resque

Existing integration used hard-coded values.  This leverages
the unpatch_resque helper instead to use the unpatched methods
instead.
Revving version to 0.0.9