Changed module name of main module to match project name.
Switched dependencies in parent xml to test scope.
Moved image files to gh-pages branch.
Implemented tests for ProcessInstanceAssert 'isWaitingAt' assertion.
Improved upon AssertionError message for assertion 'isWaitingAt'
Added test case for ProcessInstance assertion 'isWaitingAt' (non existing activity).
Using default process engine in case no explicit initialisation occured so far in
the current testing thread.