Highlights:
- Added a command line option to set a proxy server for tests to use.
- Upgraded pytest & ipython versions. Added pytest-xdist.
- Removed PhantomJS references due to SeleniumHQ dropping support.
- Added "deprecated" decorator.
- Test-logging now on by default.
- New naming system for the delayed_assert methods. (Old methods are now deprecated).
- Added thread-safe handling of log files for multithreaded test runs.