Merge pull request #6 from nuest/master

Fix database connection pool closing issue
Reorganize line breaks to get better error messages
log validation errors, too, if any occured.
Merge pull request #7 from EHJ-52n/master

Minor changes
Merge pull request #8 from nuest/master

Solr configured with Guice and new CONTRIBUTE.md file
Update CONTRIBUTE.md

Added link to generic get-involved page and fixed some encoding errors.
Merge branch 'master' into upstream-master

Conflicts:
	service/src/main/java/org/n52/sir/xml/impl/SensorML4DiscoveryValidatorImpl.java