Anchor Sass::Importers::Filesystem to root, fixes #599
Merge pull request #600 from amccloud/root-sass-importer

Anchor Sass::Importers::Filesystem to root, fixes #599
Anchor Sass::Script::String to root
Merge pull request #615 from amccloud/root-sass-module

Anchor Sass::Script::String to root
Merge remote-tracking branch 'origin/2.x'

Conflicts:
	lib/sprockets/sass_functions.rb
	lib/sprockets/sass_importer.rb