deltafun/conv now returns a cell arry of bndfuns with non-overlapping domains.
Remove internal loop in chebfun/conv. Partly addresses #1139.
adding changes suggested by AA.
Merge branch 'deltafun-conv-new' of https://github.com/chebfun/chebfun into deltafun-conv-new
Merge remote-tracking branch 'origin/deltafun-conv-new' into development