Introduce draw_op_clone

For making independent copies of draw_op objects.

Signed-off-by: Casey Dahlin <cdahlin@redhat.com>
Add clone method to draw procedure API

Signed-off-by: Casey Dahlin <cdahlin@redhat.com>
Remove lingering bits of 'target' language

Signed-off-by: Casey Dahlin <cdahlin@redhat.com>
Get rid of argument to state_create

Signed-off-by: Casey Dahlin <cdahlin@redhat.com>