Restructured project to version builds and move CSS into src.

* 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.

resources/test/WEB-INF/classes/datasource.test.properties

@@ -0,0 +1,4 @@
+dataSourceClassName=org.h2.jdbcx.JdbcDataSource
+dataSource.url=jdbc:h2:mem:
+dataSource.user=test
+dataSource.password=test