- fixed [#266](https://github.com/n1k0/casperjs/issues/266) - Fix `tester` module and its self tests
- fixed [#268](https://github.com/n1k0/casperjs/issues/266) - Wrong message on step timeout
- fixed [#215](https://github.com/n1k0/casperjs/issues/215) - added a `--fail-fast` option to the `casper test` command, in order to terminate a test suite execution as soon as any failure is encountered
- added `Tester.assertFalse()` as an alias of `Tester.assertNot()`