Separate Client haas.cfg

Split haas.cfg.exmaple into two files, one for the haas client and one
for the haas server.  Also updated the INSTALL.rst document to reflect
these changes, including isntructions on how to lock down the sensitive
information in the server-side haas.cfg file.
Merge branch 'newdocs' of git://github.com/CCI-MOC/haas into newdocs