cleanup compass

bin/all_styleguides

@@ -20,7 +20,7 @@ for project in $projects; do
         cp -ans `readlink -f $dir`/. $builddir
     done
 
-    # create compass config
+    # create sass config
     cat <<EOF > Gruntfile_${project}.js
 module.exports = function(grunt) {
     grunt.initConfig({

docs/development/coding_guides/css_guidelines.rst

@@ -274,9 +274,6 @@ Major contenders are `Sass <http://sass-lang.com/>`_,
 with Sass so we will stick with it. CSS developers must read the `Sass
 documentation <http://sass-lang.com/documentation/file.SASS_REFERENCE.html>`_.
 
-We also use `Compass <compass-style.org>`_ — a library providing many useful mixins
-and functions for Sass.
-
 There are many more interesting projects in that ecosystem. Currently, we are
 not using any of these. But we might be using some in the future.
 
@@ -495,9 +492,9 @@ Accessibility
    design <http://alistapart.com/article/responsive-web-design>`_
    (relative units like ``%``, ``em``, and ``rem``).
 -  Prefer to define foreground and background colors in the same spot.
-   Use
-   `color-contrast <http://beta.compass-style.org/reference/compass/utilities/color/contrast/>`_
-   by compass.
+   Use `color-contrast
+   <https://xi.github.io/sass-planifolia/#contrast>`_ by
+   sass-planifolia.
 -  While no support for IE < 9 is planned, do not introduce
    incapabilities where not needed (robust).