* Add the song order in a service using `performances.rank` to indicate the
relative position of each song within the service. The service page now
respects this ranking.
* Update the tests to use DB Migrate to manage the database transitions.
* Added a new version implementation to the build. The build task now triggers
an increment to the build version.
* Reconfigured the war plugin to filter source files and replace the @version@
token with the project version and to rename css and js files to include the
version number in the filename.
