Adding DIFFMAT() and CUMSUMMAT() to the trunk folder.
Fix bug in COLLOC1.CUMSUMMAT. Closes #996.
Tidying in COLLOC1.M and COLLOC2.M
Improve input parsing.
Adding tests.
Fix typo.
Adding norms method for @chebmatrix.
Fixing typos.
Modifying @chebmatrix/norms per suggestion of NH
Adding some See also lines.
Fix error and warning IDs in diffmat() and cumsummat().

Also made some minor documentation and style fixes.
Merge branch 'fix-chebmatrix-cellfun' into development
Merge remote-tracking branch 'origin/feature-chebmatrix-norms' into development
Adding simplify step after dividing by a singfun

- singfun/rdivide now matches singfun/times
- updated comment in simplifyExponent
- added test to ensure that rdivide deals with exponents as intended
Fix RADPTS --> RADAUPTS.
Merge branch 'feature-diffmat' into development
Merge remote-tracking branch 'davidgross/fix-singfun-exponents' into development
Tidy SINGFUN/RDIVIDE() a little.
Add CHEBPTS2() to the TRUNK folder.
Add uniformoutput flag to CHEBMATRIX/CELLFUN.