I initially patched CSSLint to add the "pointer-events" property, but it seems like parser-lib is the proper place to add it. (CSSLint/csslint#277 has more info).
Add "pointer-events" as a known property.
The "auto" value is not listed in the SVG 1.1 spec, but Chrome
and Firefox seem to support it so it's included here.
Thanks for the kickass pull request.