SIT-1789: redis persistence factory can connect to a remote redis
server.
SIT-1789: bumped version.
SIT-1789: removed unused error class
SIT-1789: removed a extra line.
SIT-1789: bundle install to update gem's version.
Merge pull request #6 from sittercity/SIT-1789

Sit 1789: can connect to a remote redis server