added some methods to MyPriorityQueue
downHeap implemented
Merge branch 'master' of https://github.com/PeterSchwab/AlgoDataFS13
PriorityQueue now complete
Added orderedDictionary interface
added class MyAVLTree (uncomplete)
Merge branch 'master' of https://github.com/PeterSchwab/AlgoDataFS13
added find to MyAVLTree
Mindless commit for changes.
Merge branch 'master' of https://github.com/PeterSchwab/AlgoDataFS13

Conflicts:
	src/examples/MyAVLTree.java