Replaced existing CF (polynomial only) by Joris Van Deun's current CF code (also rational).  Haven't yet done much besides superficial tests.  But now at least rational CF is in the system.
Replaced existing CF (polynomial only) by Joris Van Deun's
current CF code (also rational).  Haven't yet done much besides
superficial tests.  But now at least rational CF is in the system.


nickhale/chebfunV4,chebfun/chebfun_v4