Update README to fix links etc.

README.md

@@ -1,15 +1,16 @@
 # OpenCraft fork of edx-platform
 
-This is OpenCraft's fork of https://github.com/edx/edx-platform
+This is OpenCraft's fork of https://github.com/openedx/edx-platform
 
 We push branches here that are used for pull requests against
 the upstream edx-platform repository or other forks.
 
 This fork also holds the opencraft-release branches of edx-platform
 which may contain backported fixes for compatibility with
+[Grove](https://grove.opencraft.com/) and
 [Ocim](https://github.com/open-craft/opencraft).
 
 The **master** branch of this repository is meaningless - do not
 refer to it nor use it as a base branch for changes to edx-platform.
-Always use the edx/edx-platform master branch as a
+Always use the openedx/edx-platform master branch as a
 starting point, or whatever other branch is appropriate.