Plugin: context data set/get

Signed-off-by: Markus Pargmann <mpargmann@allfex.org>
Final changes on plugin interface

Signed-off-by: Markus Pargmann <mpargmann@allfex.org>
Bugfixes

Signed-off-by: Markus Pargmann <mpargmann@allfex.org>
Module cpusched: First real benchmark, yield-bench

Signed-off-by: Markus Pargmann <mpargmann@allfex.org>