Add documentation how to add a new adaptor to the build chain.

Simplify inclusion of *.class/*.java files from adaptors for test coverage.
Moved Eclipse Java Formatter and clean Up xml files to https://github.com/NLeSC/wiki/wiki/Eclipe .
Merge remote-tracking branch 'origin/develop' into feature/document_adding_adaptor
Update adding_adaptor.md

Replaced ' with `.
Merge pull request #8 from NLeSC/feature/document_adding_adaptor

Document adding adaptor