fabric: Separate FI_COMPLETE into separate events

Fixes #363.  Define different events rather than using a
generic FI_COMPLETE event for CM ops, AV inserts, etc.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
fabric: Remove multicast interfaces

Fixes #291 - somewhat.  The multicast interfaces have not
been implemented, and their use in consideration with AVs
is not clear.  Remove the multicast interfaces from the
1.0 release.  They will be added back after 1.0, when we
can get a clearer picture of how to integrate multicast
operations into the APIs.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>