Add support for custom namespace tags selectors

[HarryLyu]

Hello!

I have custom HTML namespaces in my project and using custom html tags.
I used to write such CSS code:

namespace:customtag {
color: red;
}

But when I switched to node-sass to compile my code, I receive an exception

/data/www/igor/web/scss/TEST.scss:1: error: invalid top-level expression

Compiling this code with simple command line scss
scss TEST.scss > 1.css
works well.

Is it a bug of node-sass or libsass?

[andrew]

That's an error in libsass, node-sass is just a thin wrapper around it, I'd recommend opening an issue here: https://github.com/hcatlin/libsass/issues