Contribution guide line

Where should I ask question about Jedi.el?

However, you may find some old questions in GitHub issue tracker so it is worth searching in it.

After you submit a pull request, check the tests on Travis CI. If you find an error you can fix, please do it.
Use PEP 8 style in Python file.
Make sure that Emacs Lisp file compiles without warning (at least make sure you don't increase the number of warnings).