Added Dimension::equal() method.
Removed UnitSystemMap.
Added virtual method pushBack_dimensions() to deckitem.
Removed UnitMap from CMakeLists.txt.
Changed parserItem::scan to return modifyable DeckItem - this is required to push dimension later.
Added const to Dimension::equal().
Deck->getKeyword() return modifiable DekcKeyword instance. Required to apply dimensions.
Added unitSystems to Deck.
Added methods applyUnitsToDeck() which push units onto the deck.
Added getNewDimension for get-or-create semantics.
KeywordContainer is accessed in non-const fashion.
Final applyUnits commit ...