Add/fix phpdoc to consistence with use & Stash

Hint about return of Stash\Cache from get() to benefit autocompletion.
Add type hint on CacheService to detect wrong types early on
Fix double whitespace in phpdoc
Merge pull request #9 from andrerom/phpDoc

Add PHPDoc & typehint to align with Stash & improve autocomplete
Update Service/CacheLogger.php

Removed obsolete use of output-buffering
Merge pull request #12 from staabm/patch-1

Update Service/CacheLogger.php
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