Custom HttpServlet implementation for serving static resources in Groningen.
Adding dependencies in pom.xml for jersey and guice-servlet
Fix failure on verify.

The failure message:

FAILURE!
java.lang.AssertionError:
  Expectation failure on verify:
    BlockScope.exit(): expected: 1, actual: 1
...
  at org.arbeitspferde.groningen.PipelineManagerTest.testStartsPipelineWithSpecificSynchronizerRequested(PipelineManagerTest.java:193)
Merge branch 'master' of https://github.com/d2rk/groningen