Bumped Ralph version number to incorporate error cleanup code.
Daniel reported seeing a backout exception in the coarse locking tests
(see:
https://gist.github.com/jackowayed/8645395/raw/4d7e8b360c6eebc402e2a18e5bd80d6082e856a7/output2.txt)

I think this is a bug with nested atomically statements and applied a
quick fix that would treat the symptom, but not the underlying
problem.  Also, filed issue #7 on github.