Update references to documentation to point at the new one

CONTRIBUTING.md

@@ -9,7 +9,7 @@ The following is a set of guidelines for contributing to Redash. These are guide
 - [Feature Roadmap](https://trello.com/b/b2LUHU7A/re-dash-roadmap)
 - [Feature Requests](https://discuss.redash.io/c/feature-requests)
 - [Gitter Chat](https://gitter.im/getredash/redash) or [Slack](https://slack.redash.io)
-- [Documentation](http://docs.redash.io)
+- [Documentation](https://redash.io/help/)
 - [Blog](http://blog.redash.io/)
 - [Twitter](https://twitter.com/getredash)
 
@@ -18,7 +18,7 @@ The following is a set of guidelines for contributing to Redash. These are guide
 
 ---
 
- 
+
 ## Table of Contents
 
 [How can I contribute?](#how-can-i-contribute)
@@ -28,12 +28,12 @@ The following is a set of guidelines for contributing to Redash. These are guide
 - [Pull Requests](#pull-requests)
 - [Documentation](#documentation)
 - Design?
- 
+
 [Addtional Notes](#additional-notes)
 
 - [Release Method](#release-method)
 - [Code of Conduct](#code-of-conduct)
- 
+
 ## How can I contribute?
 
 ### Reporting Bugs
@@ -43,26 +43,24 @@ When creating a new bug report, please make sure to:
 - Search for existing issues first. If you find a previous report of your issue, please update the existing issue with additional information instead of creating a new one.
 - If you are not sure if your issue is really a bug or just some configuration/setup problem, please start a discussion in [the support forum](https://discuss.redash.io/c/support) first. Unless you can provide clear steps to reproduce, it's probably better to start with a thread in the forum and later to open an issue.
 - If you still decide to open an issue, please review the template and guidelines and include as much details as possible.
- 
+
 ### Suggesting Enhancements / Feature Requests
 
 If you would like to suggest an enchancement or ask for a new feature:
 
 - Please check [the roadmap](https://trello.com/b/b2LUHU7A/re-dash-roadmap) for existing Trello card for what you want to suggest/ask. If there is, feel free to upvote it to signal interest or add your comments.
 - If there is no existing card, open a thread in [the forum](https://discuss.redash.io/c/feature-requests) to start a discussion about what you want to suggest. Try to provide as much details and context as possible and include information about *the problem you want to solve* rather only *your proposed solution*.
- 
+
 ### Pull Requests
 
 - **Code contributions are welcomed**. For big changes or significant features, it's usually better to reach out first and discuss what you want to implement and how (we recommend reading: [Pull Request First](https://medium.com/practical-blend/pull-request-first-f6bb667a9b6#.ozlqxvj36)). This to make sure that what you want to implement is aligned with our goals for the project and that no one else is already working on it.
 - Include screenshots and animated GIFs in your pull request whenever possible.
 - Please add [documentation](#documentation) for new features or changes in functionality along with the code.
 - Please follow existing code style. We use PEP8 for Python and sensible style for Javascript.
- 
+
 ### Documentation
 
-The project's documentation can be found at [docs.redash.io](http://docs.redash.io/). The [documentation sources](https://github.com/getredash/redash/tree/master/docs) are managed along with the code and to contribute edits / new pages, you can use GitHub's interface. Click the "Edit on GitHub" link on the documentation page to quickly open the edit interface.
-
-The pages are written in *reStructuredText* format, which is very similar to Markdown.
+The project's documentation can be found at [https://redash.io/help/](https://redash.io/help/). The [documentation sources](https://github.com/getredash/website/tree/master/user-guide) are hosted on GitHub. To contribute edits / new pages, you can use GitHub's interface. Click the "Edit on GitHub" link on the documentation page to quickly open the edit interface.
 
 ## Additional Notes