Merged gcell, the Cell SPE scheduler and RPC mechanism into the trunk.
(eb/trunk-with-gcell r8037:8085). Expect additional tweaks, but
currently works and passes distcheck.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@8086 221aa14e-8319-0410-a670-987f0aec2ac5