BTreeMap: Fix root
Maven: change release number to 2.0
Maven: increase fork count to 3
BTreeMap: revert root fix
BTreeMap: remove DirNode constructor
BTreeMap: make BNode abstract class
BTreeMap: some assertions on node constructors
BTreeMap: add checkStructure
BTreeMap: is left/right edge()
BTreeMap: #perf node serialization changed if value outside of nodes
BTreeMap: change node serialization
BTreeMap: add test which captures current behaviour of findChildren method
BTreeMap: restrict access to BNode.keys
BTreeMap: move findChildren() to BNode
BTreeMap: Add BNode.compare(pos) method
BTreeMap: limit access to BNode.keys() from unit test
BTreeMap: move node copy method into node itself
BTreeMap: cut right null in BNode.keys
BTreeMap: cut left null in BNode.keys
BTreeMap: rework remove() method, fix locking issue