Adding vml_check which does vm.conf syntax checking and looks for duplicated TAP devices.  Added running of vml_check to top of 'bmt list'.  Adding support for vml_* function's return to be passed on to exit (ie; so vml_check can 'exit 1').
Adding vml_check which does vm.conf syntax checking and looks for duplicated TAP devices.  Added running of vml_check to top of 'bmt list'.  Adding support for vml_* function's return to be passed on to exit (ie; so vml_check can 'exit 1').

ateamsystems/bmt