Updated composer.json to point to the 0.10.* release branch of Stash.
Updated bundle classes to match with the 0.10.0 Stash API. (Handlers -> Drivers, Cache -> Item)
Changed CacheService signature to match the Stash\Pool signature.
Updated tests to match the changed API.
Corrected an incorrect use statement in HandlerFactoryTest.
Updated a use statement in CacheTest.
Made some additional fixes to the bundle to ensure test passage.
Updated the CacheService to more fully duplicate the Pool functionality and fix problems with the clear() function.
Fixed use of key namespaces in the CacheService.

Fixed return of getKey from CacheResultObject to extract the namespace value.
Updated CacheTest to cover the getItemIterator method.
Merge pull request #13 from jhallbachner/0_10_sync

Update StashBundle for 0.10.* support