- fixed a  bunch of memory leaks
- allow custom cache manager
- store documents in cache again... :')
- eliminated some warnings in potential subclasses (ugh, why doesn't iOS do protected scope.. -_- )
- removed another bunch of memory leaks
Merge branch 'feature/custom_cache_manager' into develop
- allows configuration on whether to erase the cache or not when an exception occurs during fetch of document through web service
Merge pull request #48 from ptommassen/feature/custom_cache_manager

Custom cache managers
Merge pull request #49 from ptommassen/feature/cache-erasure

Allows subclasses of MBWebserviceDataHandler to not erase the cache on error
Merge branch 'release/I_0.0.2.21_PRERELEASE'