Add CI

[kevinsawicki]

We can run builds on our CI machine if atom-shell had a script that can run the specs and terminate when the tests are done, similar to Atom.

@zcbenz What do you think about adding a script/test that wraps script/test.py and handles exiting with errors if specs fail and closing the window once complete?

[zcbenz]

Having both test and test.py seems ambiguous to me, how about using cibuild as name?

And do you prefer the .py suffix if the script is written in python?

[kevinsawicki]

We can definitely do it all in script/cibuild but no suffix is the convention.

[kevinsawicki]

Awesome, this is now running on our CI machines so you should see pull requests being updated with build status information going forward.

[zcbenz]

@kevinsawicki I opened a PR #65 but the CI didn't run for it.

[kevinsawicki]

@zcbenz Thanks for letting me know, should be fixed, #65 now has a build status.