started to refactor ElasticaAdaptor to use decorators for normalization.
Implemented decorators: passing decorators.
Tested decorators: adapted and extended tests to new implementation.
Merge branch 'master' into decorators
Implemented: added verification to determine if the mandatory decorator is available if a new ElasitcaAdaptor is instantiated.
Refactored: minor changes to definition arrangements and tests
Merge pull request #14 from liip/decorators

introduced »Decorators« to be more flexible on (de)normalization of the data to be persisted.