Add unittests to the repo.

[maxking]

Also, setup the test runner and CI, probably travis.

[jiteshpabla]

I'll do it, but I don't really understand these things.

[maxking]

@jiteshpabla Let me add some sample tests to the repo and then maybe you can look at it?

[jiteshpabla]

@maxking Sure.

[emht]

Since it's been long no one picked this issue, I am picking this issue. :)

[maxking]

https://github.com/maxking/paper-to-git/blob/master/paper_to_git/tests/bin/test_commands.py

This is a very basic test that I added for the paper-git command itself. Might be a little helpful when trying to write tests. There is still a major complication in testing the functions that needs things to be properly initialized.

It would need some sort of fixtures from pytest to initialize paper-git before tests run.