rdl function to check if accumulator is empty

need to determine if there is a more standard way to do this
added *.so to 'make clean'
switch run script to new launching syntax.

now uses flux command rather than cmbd directly
added tags to constructors for Node & Socket

if bw is included as a tag, it is set for the nodes and sockets
this is using tags not the new alloc interface in the RDL (planning to switch soon)
pulled io-aware scheduler in from ngrm

uses tags in RDL to record alloc/free bw, plan to switch this to new RDL alloc/free interface
also uses the old scheduler template, plan to switch to new plugin structure