Added PR templates to project.

.github/CONTRIBUTING.md

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+# Contributing to IBM-Swift
+
+We welcome contributions, and request you follow these guidelines.
+
+ - [Raising issues](#raising-issues)
+ - [Contributor License Agreement](#contributor-license-agreement)
+ - [Coding Standards](#coding-standards)
+
+
+## Raising issues
+
+Please raise any bug reports on the issue tracker. Be sure to
+search the list to see if your issue has already been raised.
+
+A good bug report is one that make it easy for us to understand what you were
+trying to do and what went wrong. Provide as much context as possible so we can try to recreate the issue.
+
+### Contributor License Agreement
+
+In order for us to accept pull-requests, the contributor must first complete
+a Contributor License Agreement (CLA). Please see our [CLA repo](http://github.com/IBM-Swift/CLA) for more information.
+
+This clarifies the intellectual property license granted with any contribution. It is for your protection as a
+Contributor as well as the protection of IBM and its customers; it does not
+change your rights to use your own Contributions for any other purpose.
+
+### Coding standards
+
+Please ensure you follow the coding standards used throughout the existing
+code base. Some basic rules include:
+
+ - all files must have the Apache license in the header.
+ - all PRs must have passing builds for all operating systems.

.github/PULL_REQUEST_TEMPLATE.md

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+<!--- Provide a general summary of your changes in the Title above -->
+
+## Description
+<!--- Describe your changes in detail -->
+
+## Motivation and Context
+<!--- Why is this change required? What problem does it solve? -->
+<!--- If it fixes an open issue, please link to the issue here. -->
+
+## How Has This Been Tested?
+<!--- Please describe in detail how you tested your changes. -->
+<!--- Include details of your testing environment, and the tests you ran to -->
+<!--- see how your change affects other areas of the code, etc. -->
+
+## Checklist:
+<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
+<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
+- [ ] I have submitted a [CLA form](https://github.com/IBM-Swift/CLA)
+- [ ] If applicable, I have updated the documentation accordingly.
+- [ ] If applicable, I have added tests to cover my changes.