Allowing -inf for norms of CHEBMATRIX objects.
Upping a tolerance for a test that barely did not pass on my machine.
Adding documentation for the -Inf norm of CHEBMATRIX.
Merge branch 'fix-chebmatrix-infnorm' of ssh://github.com/chebfun/chebfun into fix-chebmatrix-infnorm
Merge pull request #1208 from chebfun/fix-chebmatrix-infnorm

Allowing -inf for norms of CHEBMATRIX objects.