Some of our module documentation is a bit lacking.  Fix this by filling
in some docstrings and add then adding some pointers to existing
modules/functions in the docs.

Change-Id: Ibf714225f1fc185be916e514861540fd98cb2de5

The parser is a large enough project that some proper documentation is
needed.  In order to facilitate contribution to the ramdump parser, add
some documentation with a standard sphinx Makefile to build it.

Change-Id: Idfbc65173dc082c3144ec811a75a9c226c73ec53