Change to minifyCss.

Fixes #535

gulpfile.js

@@ -50,7 +50,7 @@ var styleTask = function(stylesPath, srcs) {
     .pipe($.changed(stylesPath, {extension: '.css'}))
     .pipe($.autoprefixer(AUTOPREFIXER_BROWSERS))
     .pipe(gulp.dest('.tmp/' + stylesPath))
-    .pipe($.cssmin())
+    .pipe($.minifyCss())
     .pipe(gulp.dest(dist(stylesPath)))
     .pipe($.size({title: stylesPath}));
 };
@@ -80,7 +80,7 @@ var optimizeHtmlTask = function(src, dest) {
     })))
     // Concatenate and minify styles
     // In case you are still using useref build blocks
-    .pipe($.if('*.css', $.cssmin()))
+    .pipe($.if('*.css', $.minifyCss()))
     .pipe(assets.restore())
     .pipe($.useref())
     // Minify any HTML

package.json

@@ -9,7 +9,6 @@
     "gulp-autoprefixer": "^3.1.0",
     "gulp-cache": "^0.4.0",
     "gulp-changed": "^1.0.0",
-    "gulp-cssmin": "^0.1.7",
     "gulp-gh-pages": "^0.5.4",
     "gulp-html-extract": "^0.0.3",
     "gulp-if": "^2.0.0",
@@ -18,6 +17,7 @@
     "gulp-jscs-stylish": "^1.1.2",
     "gulp-jshint": "^1.6.3",
     "gulp-load-plugins": "^1.1.0",
+    "gulp-minify-css": "^1.2.1",
     "gulp-minify-html": "^1.0.2",
     "gulp-minify-inline": "^0.1.1",
     "gulp-rename": "^1.2.0",