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
Initial port of Michael Overtons modified FOV code.
Updates to FOV from MO (edited by NH).
Allow CHEBPOLYVAL to accept CHEBFUN inputs.
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
Adding chebfun/polyval method.
Documentation and style fixes for fov(), polyval(), chebpolyval().
Use the trig trick to compute barymats more accurately.
Pass angles to barymat when constructing rectangular diffmats.
Tidying up documentation, coding style, etc.
Merge pull request #1093 from chebfun/feature-barymat-angles

Feature barymat angles
Loosen tolerance in tests/chebop/test_eigs_orrsom.m.

This started failing for me after 6399d57f.
Adding diffmat@fourtech using Fourier basis. It is placed in @fourtech, since we currently don't have @collocfour.