update README documentation for RO (#63)

* README: update documentation for RO support

update the README and the install_dependencies script to match the
requirements of the RO conduit.

* add CODEOWNERS file

.github/CODEOWNERS

@@ -0,0 +1 @@
+@avinashkethineedi @Yiltan @BKP @abouteiller @edgargabriel @gaoikawa