Make SVGUnitTypes a regular interface with only constants

[foolip]

Fixes #291.

[foolip]

Must I be a WG member to write a PR? I'd rather not join for a one-off like this.

[AmeliaBR]

@foolip You don't have to be a WG member, but you do have to click OK to an IP agreement, acknowledging that your code & words are being freely contributed, etc.

PS, Thanks for writing this up.

[foolip]

@AmeliaBR, where can I click "OK"? I tried following the "Details" link for the failed check but it looks like an admin view for the repo owner or something.

[nikosandronikos]

@foolip: Are you at Opera?
I think the issue is that Opera doesn't have any affiliation with the SVG WG anymore (maybe you should?).
My understanding is that the ash-nazg tool would allow contributions from you without you being a WG member, as long as you have a single Member-affiliation and that member is in the group.

I'll follow this up with @shepazu and get back to you. It may be that someone from Opera needs to join the WG, or you need to fill out one of these forms.

[foolip]

@nikosandronikos no I'm at Google now.

[plehegar]

(ip check solved. we just got an improvement earlier today to avoid failing on this type of cases)