OK, everything builds now. My initial intent was to place all of

the directories at the top level but that proved troublesome.  The
kernel buildsystem and autoconf were conflicting too much.  To
resolve the issue I moved the kernel bits in to a modules directory
which can then only use the kernel build system.  We just pass
along the likely make targets to the kernel build system.

git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@11 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c