clean up pom.xml files
fix license plugin configuration
use LOGGER instead of system.out.println()
re-add xml
filter README, LICENSE and RELEASE_NOTES
reorganize root pom
update RELEASE_NOTES
Merge branch 'master' of https://github.com/52North/OX-Framework.git

Conflicts:
	52n-oxf-core/oxf-feature/src/main/java/org/n52/oxf/feature/GenericObservationParser.java