Fix whitespace and removes unused tests.

This pull request is the result from the last Transmart Community conference and the resulting discussion on the mailing (https://groups.google.com/forum/#!topic/transmart-discuss/yEttu6wXrJU) with regards to another pull request (https://github.com/thehyve/transmartApp/pull/8) on the The Hyve repo.

The changes introduced in this pull request are straightforward:
- Replaces all whitespace with 4 spaces.
- Removes trailing whitespace.
- Reformats code to a uniform style (for example always places an opening curly brace _after_ the statement/control structure)
- Removes unused imports.
- Replaces * imports with something more specific.
- Removes unused tests.

The changes were effectuated with the help of the IntelliJ IDE ("Reformat Code..." and "Optimize Imports...").
Some of the changes introduced in the pull request on the The Hyve repo were no longer necessary (most notable the line endings).
The views are excluded from the whitespace fixes as the continued operation of the app could not be guaranteed.