create alpha-3.1 SNAPSHOT branch
fix parsing issues
add log statements to trace xml message bug
thin out essential log statements
add license header
[maven-release-plugin] prepare release 52n-oxf-2.0.0-alpha.3.1
[maven-release-plugin] prepare for next development iteration
Merge pull request #1 from 52North/develop

Merge with latest updates from 52North:develop
Merge branch '2.0.0-alpha.3.2' of https://github.com/52North/OX-Framework into develop

Conflicts:
	52n-oxf-adapters/oxf-adapter-api/pom.xml
	52n-oxf-adapters/pom.xml
	pom.xml
Merge branch 'develop' of https://github.com/EHJ-52n/OX-Framework into develop
Merge pull request #2 from 52North/develop

Merge with latest updates from 52North:develop
add dependency mockito-all for tests (uses MIT license)
Update javadoc about deprecated method
add guard for receiving null values incl. tests
add guard for receiving null value or empty list incl. tests
Fix license header