Update the String#colorize docs.
Rename String::Colorizer.colorize to Babushka::ANSI.wrap.
Support both the American spelling of "colourise" and the real one.
Merge branch 'straya into colouriser
Update the colourising docs, moving the bulk of them to Babushka::ANSI.
Remove unused start_at arg from String#colourise.
The String#colourise description shouldn't be optional.
Deprecate unused colourising methods on String.
Merge branch 'colouriser'