using isinstance in favor of type()== in cern.libmadx._madx_tools
checking for tuple arity in cern.libmadx._madx_tools._mad_command
improved cern.libmadx._max_tools._mad_command_unpack

accepts also strings and collections.OrderedDict.
using new feature in cern.madx.pyx.
implemented cern.libmadx._madx_tools._read_knobfile()
returning updated and initial knobs from match() methods