doc: fix up strict errors

Running Sphinx 1.2b1 running in strict mode (-W), yields three different
errors:

* .. Running::   is an unknown command, uses '.. rubric::' instead
* double stars '**' needs either to be escaped with backslashes or
  quoted literrally with double backquotes
* nested lists needs newlines before and after for some reason.

Change-Id: I8680aef7306c619c817c637882715f5a7d08c5d9
Merge "doc: fix up strict errors"