DOC: contrib/README changed to refer to matlabsim directory

rather than matlab.  The directory name change occurred in
commit 2d6168475669460eb59c4d54bf441b231ad047b6
rm parser.out if ply table successfully built

during setup.py
copy temporary jtlv input files locally to aid debugging

if tulip.interfaces.jtlv.logger.getEffectiveLevel() <= logging.DEBUG
Merge branch 'master' into parity
fix string formatting of jtlv flattener in AST

that was malformed in:
    d85f1f226a25d0dbc2497bed8c592a98e4b7cebf
style, shift code, comments
use '&' instead of '&&' for jtlv logical conjunction operator in AST flattener

and rm lexical substitutions in the jtlv interface.
Same for other operators. Add some missing comparators to the jtlv syntax map.
add env_vars, sys_vars to strategy returned by jtlv as networkx.DiGraph
bugfix: convert "next" operator to prime only in the gr1c AST flattener
update jtlv test

all tests passing