next(fp), not fp.next() for Python 3

Also works in Python 2.6+
Paving the way for composing input filters

Got rid of else, always start off with tables = [rowsof()]
Added contribution

Command-line args not yet there.  This is just to make sure there's
no breakage.
Note for pandas users
Line endings

Got rid of DOS line endings.  (I thought git was supposed to magic
those away.)
Add contribution to command line options