"added timing and plotting code to main"
changed name of function from merge_sort to sort
changed name of mergesort.py to merge_sort.py.  added test_mergesort
changed name of test_mergesort.py to test_merge_sort.oy
timing and graphing running for merge_sort
added requirements.txt file
adding .gitignore
Merge pull request #2 from perryhook/mergesort

Mergesort