Organize top RPB folder

Move many files around into Extras folder to organize
top folder. Should optimize workflow.

Signed-off-by: Robert Wolff <robert.wolff@linaro.org>

Reference-Platform/LICENSE.md

@@ -0,0 +1,9 @@
+# License
+
+Unless otherwise specified, everything in this repository is covered by the following licence:
+
+[![Creative Commons Licence](https://licensebuttons.net/l/by-sa/4.0/88x31.png)](http://creativecommons.org/licenses/by-sa/4.0/)
+
+***Linaro Documentation*** by the [Linaro](http://www.linaro.org) is licensed under a [Creative Commons Attribution 4.0 International Licence](http://creativecommons.org/licenses/by-sa/4.0/).
+
+Based on a work at https://github.com/96Boards/documentation