added java implementation of HeapSort and QuickSort
add java package intro2algo
added java BinarySearchTree, but delete() method is NOT implemented!
updated a few methods in class BinarySearchTree
finished BinarySearchTree.delete(v), and tested.
Merge branch 'master' into javaAlgo
SAVE
a little more complex SOAP client, call remote methods with arguments
Merge branch 'javaAlgo' into develop
several .scala for "Scala for the impatient"