migrate to python
add test case
add figure for task1
rm datafile
add triangle, need test
add shortest path
Merge pull request #39 from spininertia/master

modify interfaces, add mst
Merge pull request #38 from pondering/master

Add test case for task 1 and task 3.
dummy travis
Merge pull request #41 from pondering/master

dummy travis
Update README
Rename README to README.md
add dummy test
remove quote
add dependency
Merge pull request #42 from pondering/master

About CI
Update .travis.yml

Python 3.3 require print(), I'll skip this....
Merge pull request #43 from pondering/master

Update .travis.yml
Merge pull request #44 from spininertia/master

add spectrum analysis part in doc
fix doc