Renumseq

Decided to kill the --fixBadPadding option, it was a poorly conceived, overcomplicated in how it was going to integrate and furthermore, wasn't yet implemented. It's gone now.

It was a solution to a rare problem. Instead I decided to make a new util called fixseqpadding to handle the rare times that this fix needs to happen in keeping with unix philosopy, make tools do simple things well and chain them together. Seems a far better approach.

Also, much better README.md now and better --help output. Some other logic cleanup in the util as well. Passes all regression tests.

'renum' was far too generic, plus my other commands all have 'seq' in the names, so it's more consistent with them. Better for pypi.org too. renum was taken, and my renum was too specific to take the general sounding name 'renum' out of the running.

Also, this is a full rebuild of the package, much easier to install now with pip.