Start using PHPUnit

It's a good idea to add testing to the Framework. Besides the testing
units we also implement the use of Travis-CI
Tests are needed for testing Travis-CI.

To test if the implementation of Travis-CI works we need to add some
tests. These test are regular tests for the Framwework. We're not
implementing all tests for the entire Framework or even all the test for
the class, these will be done at a later stage.
Remove newlines and tabs.

This shouldn't really be in this feature but by removing the tabs and
newlines the testing has become a bit more easy.
Version bump 1.2.0-dev.13
Merge branch 'feature/start_unit_testing' into develop