* MultiTask->process runs on its own thread within Hamlib backend,
thus no need to compile GNUradio with -DTHREAD=1.
* Appropriate locking to gurantee GNUradio coherency wrt multithreading.
* support for tuner control through Hamlib! The rig model number
can be set through set_conf
* made backend fully vfo targetable
* added set_level/get_level support. setting RIG_LEVEL_RF works!
git-svn-id: https://hamlib.svn.sourceforge.net/svnroot/hamlib/trunk@1368 7ae35d74-ebe9-4afe-98af-79ac388436b8