Updates to poorsmatic example application

All usage and mention of TorqueBox.transaction was removed - we don't
support XA with Datamapper so this wasn't working as intended anyway.

The database was also switched from Postgresql to Sqlite to simplify
setup locally. The TwitterService was modified to not error if the
user doesn't change the default dummy credentials - insteaad it just
logs a warning and doesn't start.
Be less noisy about not finding torquebox-transactions in a Gemfile
Bump versions in getting started guide output
Disable Quartz update checking (TORQUE-1005)
Update to polyglot 1.12.0
[maven-release-plugin] prepare release 2.3.0
[maven-release-plugin] prepare for next development iteration