Rotational symmetry mod, dtwavexfm2b and dtwaveifm2b
Added utils.py, containing drawedge and drawcirc for generating synthetic images
docs: add stub for variant transforms

Add a place where variant transforms may be documented.
docs: add dtcwt.utils to API reference

Update docs/reference.rst to add documentation for the dtcwt.utils
module.
re-indent replacing tabs with spaces
Update variant.rst
Some doc updates (modified wavelet images)
Added testing capability, fixed documentation table issue
Verification suite changes. verificationb.mat is static.
remove *~ editor files
merge verification output into single mat file