working on @chebtech-simplify
changing SIMPLIFY to not zero interior coefficients
various changes related to SIMPLIFY
more changes to SIMPLIFY and associated tests
another test adjustment in view of SIMPLIFY
Correcting documentation and coding style.
Minor.
Fixing a bug for checking if F's range falls in G's domain by allowing an overshoot of one eps.
Merge pull request #1088 from chebfun/fix-simplify

Fix simplify