Adding Windows Calculator Roadmap Document (microsoft#37)

* Create Roadmap.md

* Update Roadmap.md

* Adding reference to roadmap in README

* Update README.md

README.md

@@ -42,6 +42,9 @@ Want to contribute? The team encourages community feedback and contributions. Pl
 If Calculator is not working properly, please file a report in the [Feedback Hub](https://insider.windows.com/en-us/fb/?contextid=130).
 We also welcome [issues submitted on GitHub](https://github.com/Microsoft/calculator/issues).
 
+## Roadmap
+For information regarding Windows Calculator plans and release schedule, please see the [Windows Calculator Roadmap](docs/Roadmap.md).
+
 ## Data / Telemetry
 This project collects usage data and sends it to Microsoft to help improve our products and services.
 Read our [privacy statement](http://go.microsoft.com/fwlink/?LinkId=521839) to learn more.

docs/Roadmap.md

@@ -0,0 +1,20 @@
+# Windows Calculator Roadmap
+
+Windows Calculator is under active development by Microsoft.
+
+## Focus
+
+In 2019, the Windows Calculator team is focused on:
+* Refining our open source development process on GitHub
+* Iterating upon the existing app design based on the latest [Fluent Design guidelines](https://developer.microsoft.com/en-us/windows/apps/design)
+* Improving testing and diagnostics within the project
+* Investigating new features with a focus on addressing top user feedback, including:
+  * Adding the ability for users to pin Calculator on top of other windows
+  * Providing additional customization options
+  * [Your feature idea here] - please review our [new feature development process](https://github.com/Microsoft/calculator/blob/master/docs/NewFeatureProcess.md) to get started!
+
+We welcome contributions of all kinds from the community, but especially those that support the efforts above. Please see our [contributing guidelines](https://github.com/Microsoft/calculator/blob/master/CONTRIBUTING.md) for more information on how to get involved.
+
+## Releases
+
+Windows Calculator is included in every Windows 10 release as a [provisioned Windows app](https://docs.microsoft.com/en-us/windows/application-management/apps-in-windows-10#provisioned-windows-apps). We also deliver updates through the [Microsoft Store](https://www.microsoft.com/store/productId/9WZDNCRFHVN5) approximately monthly.