Update guidelines to more aggressively push using/updating status document

Author: Itai Ferber

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Contributing
 
-Contributions to Foundation are welcome! This project follows the [contribution guidelines for the Swift project](https://swift.org/contributing/#contributing-code). A few additional details are outlined below.
+Contributions to Foundation are welcome! This project follows the [contribution guidelines for the Swift project](https://swift.org/contributing/#contributing-code). If you are interested in contributing, please consult with our [status page](Docs/Status.md) to see what work remains to be done. A few additional details are outlined below.
 
 ## Licensing
 
@@ -36,6 +36,9 @@ All pull requests which contain code changes should come with a new set of autom
 
 Most of the methods in Foundation are lacking documentation. We appreciate your help in filling out documentation when you implement a method. Use the markdown syntax in the [Swift Naming Guidelines](https://swift.org/documentation/api-design-guidelines.html#write-doc-comment).
 
+##### Implementation Status
+We are currently keeping track of the implementation status and test coverage status of our public classes on our [status page](Docs/Status.md). If you make changes to our public interfaces, please take care to update the corresponding entries in that document.
+
 ## API Changes
 
 The interface of Foundation is intended to be both stable and cross-platform. This means that when API is added to Foundation, it is effectively permanent.

README.md

@@ -50,7 +50,7 @@ You will want to use the [Swift Package Manager](https://swift.org/package-manag
 
 ## Working on Foundation
 
-For information on how to build Foundation, please see [Getting Started](Docs/GettingStarted.md). Once you're ready to make changes of your own, check out our [information on contributing](CONTRIBUTING.md).
+For information on how to build Foundation, please see [Getting Started](Docs/GettingStarted.md). If you would like, please consult our [status page](Docs/Status.md) to see where you can make the biggest impact, and once you're ready to make changes of your own, check out our [information on contributing](CONTRIBUTING.md).
 
 ## FAQ