Update readme
Upload new file: MergeSort.java---version 0.5. Implementation of Merge Sort in Array and Linked List.
Merge branch 'workspace' of github.com:shinrain/interview into workspace
Lazy Modification of Mergesort.java
LAZY: add instrction of commit message and version message
MODIFY: Upload a wrapper function to run sorting algorithm.
MODIFY: Merge Sort version 1.0
MODIFY: add Q1. Question detail is in ./code/question/readme
MODIFY: add Q1. Question detail is in ./code/question/readme
LAZY: add comments to Q1.run.java
LAZY: add idea to Q1
LAZY: change some file names and add instruction of build and clean command in readme
LAZY: fix conflicts in readme when merge to workspace