Add parameter to ms-respond() to render all rules with !important

[hansspiess]

To use modularscale with utility classes in inuitcss they have to render with !important to follow the inuit specifity convention (keeping a "flat" specifity tree across elements and components but let single purpose utility classes trump everything else, intentionally).

This changes the signature of ms-respond() but does not break anything since the additional parameter can be omitted entirely.

[scottkellum]

Thanks @hansspiess I’ll merge and version up tonight. I’ll probably leave this feature undocumented but this is well written and considerate code that I’m sure will solve specificity problems for a lot of people.

Also if I don’t close this by Sunday I have forgotten about it, please ping the thread.

[scottkellum]

Sorry for the delay, thank you for the PR!