address nick's comments
address nick's 2nd round comments
address 3rd round of comments
add download script for byfn content
add samples.rst and adapt the bootstraping to
reflect the new scheme for handling fabric samples

Change-Id: Ic1aeb8bf80f49b79c355000c6a0775428fe14c4c
Signed-off-by: Christopher Ferris <chrisfer@us.ibm.com>