Merge pull request #11 from HaoranHuang/develop

Merged with sam's version
clean up files and add comments
Merge pull request #12 from samzhao88/develop

clean up files and add comments
aaa
aaa
Update README.md
reorganize the code
Merge branch 'develop' of https://github.com/FlightFinder/FlightFinder into develop
reorganize the code