Need a fast way to normalize/standardize/slugify column names

[onyxfish]

See wireservice/csvkit#396

[onyxfish]

We should pull a known good slugifier into utils, such as the one used in Django. Then this could be a flag to the constructor or a method similar to rename. (I'm debating which I prefer.)

[onyxfish]

Maybe https://github.com/un33k/python-slugify

[onyxfish]

Could also lead to a Slugify(columns) computation, which would be handy.

[onyxfish]

Note, that slugger doesn't handle uniqueness, but this one does: https://github.com/dimka665/awesome-slugify

[nbedi]

@onyxfish added slugify into utils. It wraps around https://github.com/dimka665/awesome-slugify.

A flag to the constructor and a whole new method felt off to me. Ended up adding it as an option to Table.rename since it feels like an advanced functionality of renaming and had the best of both. Let me know what you think and if I should adjust.