Adding Drush port of https://github.com/Lullabot/casperjs_foundation.
Remove --verbose call.
Use a test-root option instead of relying on repo root.
Oops.
If a test root directory is provided but not any test files, pass the directory as an arguemnt and not as the --root option.
Adding commented-out section in drushrc.php with how to configure casperjs test directory.
Clarified test root comment.
Support --cookies-file and --url being passed in manually. Re-add --verbose.
Added option documentation and passthrough for --includes.
I hate PHP.
Issue #26 remove old common.js
Issue #26 rename test directory to tests

Since now it will hold actual CasperJS tests.
Issue #26 Add session management, verbose mode and screenshots

This commit adds the follwing features:

* Tests are found at tests directory by default.
* Session managemente and common functions are added for every test.
* Added README file with installation instructions and tips.
* Added examples to the drush casperjs command.
* Added a test for the homepage and a test to create content
  managing sessions.
Merge branch 'master' into casperjs-runner

Conflicts:
	drush/drushrc.php
Merge pull request #26 from Lullabot/casperjs-runner

Add drush command for running casper tests (integrate https://github.com/Lullabot/casperjs_foundation)