Add missing files

CONTRIBUTING.md

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+# CONTRIBUTING
+
+### Method of adding changes
+
+Changes will be added via branching:
+
+* Create a new branch with a descriptive name, followed by _ and initials, (for example: contributing_AG).
+* Make all changes in this branch, and commit and push your changes.  
+* When the branch is ready to merge, open a pull request for the merge, tagging the other two contributors.
+* Once this issue is raised STOP working in this branch until the issue is resolved.
+* Either of the other contributors has full authority to merge changes.
+* When a branch is merged in with the Master, that branch should be immediately deleted.
+
+### Raising Issues
+
+Please raise an issue for any and all things!  As a courtesy, please tag all of the contributors.
+
+### Commit Messages
+
+Remember that commit messages are the way to remember what was done, and keep messages meaningful.
+
+### Directory Structure
+
+Keep all documents in the correct folder, when in doubt, ask the other contributors (perhaps in an issue?).  Remember to cite any sources in the `doc\references\README.md`, which documents any citations.
+
+
+### Git Commands
+
+1. Create a new branch
+    ```
+    git branch -b [BRANCH NAME]
+    ```
+2. After completing some tasks:
+
+    1. Add *all* files that have been worked on
+        ```
+        git add .
+        ```
+   2. Add commit message
+       ```
+       git commit -m '[COMMIT MESSAGE]'
+       ```
+   3. Push from new branch for the first time
+       ```
+       git push --set-upstream origin [BRANCH NAME]
+       ```
+   4. Push anytime after that
+       ```
+       git push
+       ```
+   5. Navigate to  [Compare changes](https://github.com/UBC-MDS/ptoolkit/compare) and create pull request for the branch of interest.
+
+   6. Wait for a member of the team to merge [pull request](https://github.com/UBC-MDS/ptoolkit/pulls).
+
+3. If you need to update the branch that you are currently working in with the updated master branch:
+    ```
+    git pull origin master
+    ```

Conduct.md

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+# Code of Conduct
+
+As contributors to the P Toolkit project we:
+
+- Respect each other's opinions and ideas.
+- Accept the ideas from anyone interested in contributing to this project.
+- Communicate using a respectful language. Any comment, issue or interaction with an offensive language of tone will be removed.
+- Cite our sources and give attribution to the author/s for all the content used for building this package.
+- Are compromised to make statistics more simple and fun for practitioners :)

LICENSE

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+MIT License
+
+Copyright (c) 2018 Master of Data Science at the University of British Columbia
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.