add @import support

Author: tj

index.js

@@ -14,6 +14,7 @@ module.exports = function(css){
   function stylesheet() {
     var rules = [];
     var node;
+    whitespace();
     comments();
     while (node = atrule() || rule()) {
       comments();
@@ -177,12 +178,23 @@ module.exports = function(css){
     return decls;
   }
 
- /**
-  * Parse at rule.
-  */
-  
+  /**
+   * Parse import
+   */
+
+  function atimport() {
+    var m = match(/^@import *([^;\n]+);\s*/);
+    if (!m) return;
+    return { import: m[1] };
+  }
+
+  /**
+   * Parse at rule.
+   */
+   
   function atrule() {
-    return keyframes();
+    return keyframes()
+      || atimport();
   }
 
   /**

test/cases/import.css

@@ -0,0 +1,6 @@
+
+@import url("fineprint.css") print;
+@import url("bluish.css") projection, tv;
+@import 'custom.css';
+@import "common.css" screen, projection;
+@import url('landscape.css') screen and (orientation:landscape);

test/cases/import.json

@@ -0,0 +1,21 @@
+{
+  "stylesheet": {
+    "rules": [
+      {
+        "import": "url(\"fineprint.css\") print"
+      },
+      {
+        "import": "url(\"bluish.css\") projection, tv"
+      },
+      {
+        "import": "'custom.css'"
+      },
+      {
+        "import": "\"common.css\" screen, projection"
+      },
+      {
+        "import": "url('landscape.css') screen and (orientation:landscape)"
+      }
+    ]
+  }
+}