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CONTRIBUTING.md

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+# Contributing to IJavascript
+
+First of all, thank you for taking the time to contribute.
+
+Here, you will find important information for contributing to this project.
+
+## Reporting an issue
+
+Please, feel free to report any issues you encounter or any enhancements you
+would like to see implemented. To facilitate the process of fixing an issue,
+please, include the following information in your report:
+
+- npm version. Please, run the command:
+
+```sh
+npm version
+```
+
+- Operating system. In most modern linux distributions, it is enough to run:
+
+```sh
+lsb_realease -sd
+```
+
+## Sending Pull Requests
+
+- Pull requests will be distributed under the terms in the LICENSE file. Hence,
+  before accepting any pull requests, it is important that the copyright holder
+  of a pull request acknowledges their consent. To express this consent, please,
+  ensure the AUTHORS file has been updated accordingly.
+
+## Coding Guidelines
+
+- For the sake of readability, please, ensure the coding style of your pull
+  requests is consistent with this project: lowerCamelCaseNaming,
+  CONSTANTS_NAMING, 4-space indent, collapsed brackets... As a guideline, I will
+  try to follow the recommendations proposed in the [Google Javascript Style
+  Guide](http://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml).
+
+- The IPython protocol uses underscores, `_`, in their the naming convention (as
+  recommended in [PEP8](https://www.python.org/dev/peps/pep-0008/)). For these
+  names, I find more readable to keep the original naming (although, if possible
+  limited to a local scope).