reproduced issue 41
Merge remote-tracking branch 'origin/master' into deadlocks_on_prepend_sibling
updated rubygems references to use https
make db names consistent with with_advisory_lock
addressed issue 41. All writes are surrounded with an advisory lock now.
updated readme to version 3.7.3
use 0.0.6 of with_advisory_lock
skip sqlite
get the requires in the right order
include 3.0.x