Update dependencies

Updates HtmlUnit from 2.9 to 2.11, on the way clean up some deprecations and dropped some unused deprecated methods.

I needed to update the testcases/testdata as well, but still have some whitespace errors on the Class.instrumented.js file that I can't seem to resolve... The tests seem to be very platform specific anyway.
revert earlier changes to paths

Revert earlier changes to the paths in this testcase as they fail when running on Travis-CI
Merge pull request #70 from mprins/deps-updates

Update dependencies (notably HtmlUnit)