Move data transformation code from tests to a Transform class (#5)

Move the actual transformation code into a Transform class, call
that from the tests. Add a main method to do the actual full
transformation (run Transform.java as Java application).

Run NtToEs.java in oer-api to index the result in Elasticsearch.
Merge pull request #82 from hbz/run-transformation

Move data transformation code from tests to a Transform class