Adds Contributing document, bug and feature request templates (#449)

* Adds Contributing document, bug and feature request templates

* Adds Tao comments

.github/CONTRIBUTING.md

+# Contributing Guide
+
+## Reporting an Issue
+The easiest way you can contribute to Amundsen is by creating issues. For that, please use the [issues][issues] section of the Amundsen repository and search for a similar problem. If you don't find it, submit your bug, question, proposal or feature request.
+
+In the case of bugs, please be descriptive and, if possible, include a screenshot of the issue.
+
+## Creating Pull Requests
+Before sending a Pull Request with significant changes, please use the [issue tracker][issues] to discuss the potential improvements you want to make.
+
+## First-Time Contributors
+If this is your first contribution to open source, you can [follow this tutorial][contributionTutorial] or check [this video series][contributionVideos] to learn about the contribution workflow with GitHub.
+
+We always have tickets labeled ['good first issue'][goodFirstIssues] and ['help wanted'][helpWantedIssues]. These are a great starting point if you want to contribute. Don't hesitate to ask questions about the issue if you are not sure about the strategy to follow.
+
+## Requesting a Feature
+We have created a [Roadmap][roadmap] document with our plans for next releases, however, we are open to hear your ideas for new features! 
+
+For that, you can create an issue and select the "Feature Proposal" template. Fill in as much information as possible, and if you can, add responses to the following questions:
+- We'll need to add a new model or change any existing model?
+- What would the Migration Plan look like? Will it be backwards-compatible?
+- Which alternatives did you consider?
+
+## Setup
+To start contributing to Amundsen, you need to set up your machine to develop with the project. For that, we have prepareda a [Developer Guide][developerGuide] that will guide you to set up your environment to develop locally with Amundsen.
+
+## Get Recognition
+You can add yourself or somebody else to the contributors list by using the [All Contributors bot][allContributorsBot].
+
+## Next Steps
+Once you have your environment set and ready to go, you can check our [documentation][documentationHomepage] and the project's [Roadmap][roadmap] to see what's coming.
+
+
+[issues]: https://github.com/lyft/amundsen/issues
+[allContributorsBot]: https://allcontributors.org/docs/en/bot/usage
+[contributionTutorial]: https://github.com/firstcontributions/first-contributions#first-contributions
+[contributionVideos]: https://egghead.io/courses/how-to-contribute-to-an-open-source-project-on-github
+[goodFirstIssues]: https://github.com/lyft/amundsen/labels/good%20first%20issue
+[helpWantedIssues]: https://github.com/lyft/amundsen/labels/help%20wanted
+[developerGuide]: https://lyft.github.io/amundsen/developer_guide/
+[roadmap]: https://lyft.github.io/amundsen/roadmap/
+[documentationHomepage]: https://lyft.github.io/amundsen/

.github/ISSUE_TEMPLATE/bug-report.md

+---
+name: Bug Report
+about: Create a bug report
+title: Bug Report
+labels: bug
+assignees: ''
+
+---
+
+<!--- Provide a general summary of the issue in the Title above -->
+<!--- Look through existing open and closed issues to see if someone has reported the issue before -->
+
+## Expected Behavior
+<!--- Tell us what should happen -->
+
+## Current Behavior
+<!--- Tell us what happens instead of the expected behavior -->
+
+## Possible Solution
+<!--- Not obligatory, but suggest a fix/reason for the bug -->
+
+## Steps to Reproduce
+<!--- Provide a link to a live example, or an unambiguous set of steps to -->
+<!--- reproduce this bug. Include code to reproduce, if relevant -->
+1.
+2.
+3.
+4.
+
+## Screenshots (if appropriate)
+
+## Context
+<!--- How has this issue affected you? -->
+<!--- Providing context helps us come up with a solution that is most useful in the real world -->
+
+## Your Environment
+<!--- Include as many relevant details about the environment you experienced the bug in -->
+* Amunsen version used:
+* Data warehouse stores:
+* Deployment (k8s or native):
+* Link to your fork or repository:
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.github/ISSUE_TEMPLATE/feature-request.md

+---
+name: Feature Request
+about: Create a feature request
+title: Feature Proposal
+labels: feature proposal
+assignees: ''
+
+---
+
+<!--- Provide a general summary of the feature request or improvement in the Title above -->
+<!--- Look through existing open and closed feature proposals to see if someone has asked for the feature before -->
+
+## Expected Behavior or Use Case
+<!--- Tell us how it should work -->
+
+## Service or Ingestion ETL
+<!--- Tell us to which service or component this request is related to -->
+
+## Possible Implementation
+<!--- Not obligatory, suggest ideas of how to implement the addition or change -->
+
+## Example Screenshots (if appropriate):
+
+## Context
+<!--- Why do you need this feature or improvement? What is your use case? What are you trying to accomplish? -->
+<!--- Providing context helps us come up with a solution that is most useful in the real world -->
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