Remove pimple dependency

Pimple source and test added as suggested in #21 issue, then added `aik099` namespace prefix.

Files were just copied, so they adhere to Pimple coding standards. I see that phpunit-mink has got its own coding standards, but I don't know it nor how to check it. Please advise.

**Caveat**: test error that I can't find a way to fix or figure out what is wrong:
```
1) tests\aik099\PHPUnit\Integration\EventDispatchingTest::testSetupEvent
Mockery\Exception\InvalidCountException: Method stop() from Mockery_5_Behat_Mink_Session should be called
 exactly 2 times but called 0 times.
```
Typo that hot committed accidentally. Thanks for spotting this.
On 7 Nov 2014 16:56, "Alexander Obuhovich" <notifications@github.com> wrote:

> In tests/aik099/PHPUnit/Fixture/ApiIntegrationFixture.php:
>
> > @@ -52,7 +52,7 @@ public function setEventDispatcher(EventDispatcherInterface $event_dispatcher)
> >  	 *
> >  	 * @return void
> >  	 */
> > -	public function verifyRemoteAPICalls(TestEvent $event)
> > +	public function lverifyRemoteAPICalls(TestEvent $event)
>
> I wonder why you've added l in front of method name. Maybe this is the
> cause of that error with expected call count you're having.
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/aik099/phpunit-mink/pull/22/files#r20017861>.
>