use 'with-grouped' for top-level grouping
use 'with-grouped' for top-level grouping

instead of overloading with-concur at the top level,
we now have several different types of "with" statements
that behave similarly but are convenient to name differently
in order to make things more readable.  So 'grouped'
replaces the meta-concur at the top-level.

BBN-Q/pyqgl2,BBN-Q/pyqgl2