addedMySkipList (uncomplete)
Merge branch 'master' of https://github.com/PeterSchwab/AlgoDataFS13
added insert method to MySkipList
completed class MySkipList and MyAVLTree
corrected an error in the shrink method of MySkipList
added the quickSelect to Sorttest (to be completetd)
added IncideceListGraph and some interfaces
Merge branch 'master' of https://github.com/PeterSchwab/AlgoDataFS13