Add link to known RTM issue described on MSDN forum.

This known issue is very difficult to find from search engines (since it seems to be caused by the Windows Universal tooling SDK). Adding a link here will make the workaround more discoverable.

known-issues/known-issues-general.md

@@ -84,6 +84,9 @@ npm config set registry http://registry.npmjs.org
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 **Mixed case file added as lower case reference:** Dragging a mixed-case file into an HTML page creates a lowercase script or style reference which will cause it to not be found on Android and iOS. Manually update the reference with the correct casing.
 
+----------
+**Visual Studio hangs when creating or opening a Cordova jsproj:** Follow the steps [in this MSDN blog post](https://social.msdn.microsoft.com/Forums/en-US/0e5115ca-83a7-4294-8740-289b3f453fca/rtm-known-issue-package-load-failure-when-creating-a-windows-app-project-with-javascript-or-hang).
+
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 ## More Information
 * [Read up on additional known issues, tips, tricks, and tutorials](../Readme.md)