chore(contrib): Add PR template and commit message guidelines. (#148)

Author: rashidsp

.github/pull_request_template.rst

@@ -0,0 +1,15 @@
+Summary
+-------
+
+-  The “what”; a concise description of each logical change
+-  Another change
+
+The “why”, or other context.
+
+Test plan
+---------
+
+Issues
+------
+
+-  “THING-1234” or “Fixes #123”

CONTRIBUTING.rst

@@ -9,15 +9,16 @@ read the guidelines below for information on submitting your code.
 Development process
 -------------------
 
-1. Create a branch off of ``master``:
-   ``git checkout -b YOUR_NAME/branch_name``.
-2. Commit your changes. Make sure to add tests!
-3. Lint your changes before submitting: ``pep8 YOUR_CHANGED_FILES.py``.
-4. ``git push`` your changes to GitHub.
-5. Make sure that all unit tests are passing and that there are no merge
+1. Fork the repository and create your branch from master.
+2. Please follow the `commit message guidelines`_ for each commit message.
+3. Make sure to add tests!
+4. Run ``pep8`` to ensure there are no lint errors.
+5. ``git push`` your changes to GitHub.
+6. Open a PR from your fork into the master branch of the original repo.
+7. Make sure that all unit tests are passing and that there are no merge
    conflicts between your branch and ``master``.
-6. Open a pull request from ``YOUR_NAME/branch_name`` to ``master``.
-7. A repository maintainer will review your pull request and, if all
+8. Open a pull request from ``YOUR_NAME/branch_name`` to ``master``.
+9. A repository maintainer will review your pull request and, if all
    goes well, squash and merge it!
 
 Pull request acceptance criteria
@@ -76,5 +77,6 @@ If you have questions, please contact [email protected].
 
 .. _Contributor License Agreement (CLA): https://docs.google.com/a/optimizely.com/forms/d/e/1FAIpQLSf9cbouWptIpMgukAKZZOIAhafvjFCV8hS00XJLWQnWDFtwtA/viewform
 .. _README: README.rst
+.. _commit message guidelines: https://github.com/angular/angular/blob/master/CONTRIBUTING.md#-commit-message-guidelines
 .. _deviations: https://github.com/optimizely/python-sdk/blob/master/tox.ini
-.. _Apache License v2.0: http://www.apache.org/licenses/LICENSE-2.0
+.. _Apache License v2.0: http://www.apache.org/licenses/LICENSE-2.0