Updated specs to be compatible with the latest phpspec version.
Updated travis script to reflect the change of the bin dir.
Merge remote-tracking branch 'upstream/master' into phpspec-update
Fixed specs by unwrapping the ObjectProphecy when it is a collaborator.
Rolled back the bin-dir configuration.
Explicitly defined the phpspec version.
Merge pull request #12 from jakzal/phpspec-update

Updated specs to be compatible with the latest phpspec version.