node-sass workarounds

[akvadrako]

1. The current release of node-sass doesn't support urls without a schema. Using https should always work and it required if accessing the HTML using a file:// url.
2. node-sass complained about the syntax of a line containing tooltip-classes, but I wasn't sure what it's purpose was, since it looks like an empty mixin.

[dreerr]

Yes, /lib-core/sass/core/_direct-apply.sass:192 ia an empty mixin and also was giving me troubles.

[maksimkurb]

+1
It is complicated, to use kickstart with node-sass without theese fixes

[adamjgrant]

I'll take a look at this in a newer version. There are probably some simplifications we can make here.