mr: add page

pages/common/mr.md

@@ -0,0 +1,19 @@
+# mr
+
+> Myrepos manages all your version control repositories at once
+
+- Register repository:
+
+`mr register`
+
+- Update repository in 5 concurent jobs:
+
+`mr -j5 update`
+
+- Prints status of my repos:
+
+`mr status`
+
+- Checkout my repos to latest version:
+
+`mr checkout`