better JavaScript evaluation

- support for returning Array values
- Expressions/Values are passed as arrays to JavaScript
- fixed some edge cases

test/css/javascript.css

@@ -2,6 +2,7 @@
   js: 42;
   js: 2;
   js: "hello world";
+  js: 1, 2, 3;
   title: "node";
   ternary: true;
 }
@@ -14,4 +15,8 @@
 }
 .escape-interpol {
   width: hello world;
-};
+}
+.arrays {
+  ary: "1, 2, 3";
+  ary: "1, 2, 3";
+}

test/less/javascript.less

@@ -2,13 +2,14 @@
     js: `42`;
     js: `1 + 1`;
     js: `"hello world"`;
+    js: `[1, 2, 3]`;
     title: `process.title`;
     ternary: `(1 + 1 == 2 ? true : false)`;
 }
 .scope {
     @foo: 42;
     var: `this.foo.toJS()`;
-    escaped: e(`2 + 5 + 'px'`);
+    escaped: ~`2 + 5 + 'px'`;
 }
 .vars {
     @var: `4 + 4`;
@@ -16,5 +17,11 @@
 }
 .escape-interpol {
     @world: "world";
-    width: ~`"hello" + " " + "@{world}"`;
+    width: ~`"hello" + " " + @{world}`;
+}
+.arrays {
+    @ary:  1, 2, 3;
+    @ary2: 1  2  3;
+    ary: `@{ary}.join(', ')`;
+    ary: `@{ary2}.join(', ')`;
 }