tweaked mathify to simply return back any line that doesn't split with
one equal sign
Merge branch 'master' of github.com:flyeng4/py_directive

- Bill did some modification to how to handle lines without equal signs

Conflicts:
	py_directive.py
Merge branch 'master' of github.com:flyeng4/py_directive
just deleted my changes
Krauss latex find/replace mathify hack
call code2math for all rhs cases in mathify, regardless of whether or
not they are eval-ed and also changed the tests