build-script ammendments: :backend/tools => :tools; facade tasks
* moved subproject :backend/tools to :tools to save some typing
* added high level tasks for preparation/deletion of the DB data and indices: createAll, recreateAll, cleanDbAndIndices
Removed programmatic log level configuration in PapeImporter
bugfix: added shutdown of FixedThreadPoolExecutor to ensure termination of fulltext index creation process
Bumped Gradle Wrapper to use current stable version (1.11)
fix: MethodNotFound for Rails init after method renaming in LoadFixtures
test & fix: FullTextSearchServices yielded error when result set was empty

* opened FulltextSearchService for mocking by introducing IndexSearch interface
* added ScalaMock to project -> Scalatest version adjusted to milestone 2.0M5b
* added test for FullTextSearchService
* adjusted SpellCheckertest to unimplemented expectResult
build-script: minor improvements
logging: corrected invalid loglevel setting for C3P0 (not it's indeed as quiet as intended)
build-scripts: added/improved description for maintenance and rails tasks, introduced corr. task groups

Also added switch to dbReport wether to print entity examples ( -Pexamples=true )