Support include paths #23
Description
When using include paths in combination with this importer the include paths are simply ignored.
When looking into how include paths could be supported I ran into the same issue as mentioned in #13: That one then would also have to add logic that looks for all valid variations of a Sass file to be able to step through each and every include path as well as the local path to figure out if a file is available or not.
Solving this would involve looking for these file names:
name.scssname.sass_name.scss_name.sass
And doing so first locally and then on each and every include path until one either finds a file or finds no file.
Reference in Sass docs: http://sass-lang.com/documentation/file.SASS_REFERENCE.html#import