For some reasons, the file I tried to submit in r1542 didn't make it, so here it is again. The same log message holds as before:
For some reasons, the file I tried to submit in r1542 didn't make it, so here
it is again. The same log message holds as before:

Allowing calls to chebop/feval for the form 
   f = chebfun('sin(3*x)'); 
   L = chebop(-1,1); 
   L.op = @(x,u) diff(u,2); 
   L*f



nickhale/chebfunV4,chebfun/chebfun_v4