Initial Commit
This is first check in for exercise. This check in include below exercise.
Sort related
1. BubbleSort
2. QuickSort
3. InsertSort
4. CountSort
5.MergeSort

List related:
1.FindLastKNode
2.Add node to the tail of list

String related:
1. Replace blank with %20. Algiruthm is O(n)
add two more files from git repository