Implement various additional wire protocol commands.

Logging
Orientation
Equals
ActiveElement
Touch events
Merge pull request #91 from ashleydw/master

Implement touch events and various other protocols (orientation, logging, equals, and active element)
Update composer.json

Update php version.
Add sample.php
Merge remote-tracking branch 'upstream/master'

Conflicts:
	lib/WebDriverCommandExecutor.php
	lib/support/events/EventFiringWebElement.php