Added support for 'data' keywords ~ the PORO and PERMX keywords
Added some keywords
Changed data container in DeckXXXItem std::deque -> std::vector
Added const std::vector<T>& DeckTItem::getTData()
Added methods const std::vector<T>& DeckKeyword::getTData() which goes all the way through DeckRecord(0)->DeckItem(0)
Added test for parsing PORO keyword from file
Merge pull request #25 from joakim-hove/config-data

Simplify configuration of grid property keywords like PORO and ACTNUM