adding new stuff

plugins/bundle/jedi-vim/jedi/CONTRIBUTING.md

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+Pull Requests are great (on the **dev** branch)! Readme/Documentation changes
+are ok in the master branch.
+
+ 1. Fork the Repo on github.
+ 2. If you are adding functionality or fixing a bug, please add a test!
+ 3. Add your name to AUTHORS.txt
+ 4. Push to your fork and submit a **pull request to the dev branch**.
+
+My **master** branch is a 100% stable (should be). I only push to it after I am
+certain that things are working out. Many people are using Jedi directly from
+the github master branch.
+
+**Try to use the PEP8 style guide.**
+
+
+Changing Issues to Pull Requests (Github)
+-----------------------------------------
+
+If you have have previously filed a GitHub issue and want to contribute code
+that addresses that issue, we prefer it if you use
+[hub](https://github.com/github/hub) to convert your existing issue to a pull
+request. To do that, first push the changes to a separate branch in your fork
+and then issue the following command:
+
+    hub pull-request -b davidhalter:dev -i <issue-number> -h <your-github-username>:<your-branch-name>
+
+It's no strict requirement though, if you don't have hub installed or prefer to
+use the web interface, then feel free to post a traditional pull request.