OOCMap should automatically grow

[dirkgr]

This would mean that you don't have to specify a size anymore when you create OOCMap. LMDB is perfectly capable of doing this. The problem is that resizing the map wipes out all active transactions. That means we have to be able to re-start transactions for objects that keep them around, like LazyListIter and LazyDictIter. This will be quite involved.