Update Less to 1.7.0

Gruntfile.js

@@ -254,7 +254,7 @@ module.exports = function (grunt) {
                     'src/thirdparty/CodeMirror2/addon/selection/active-line.js',
                     'src/thirdparty/mustache/mustache.js',
                     'src/thirdparty/path-utils/path-utils.min',
-                    'src/thirdparty/less-1.4.2.min.js'
+                    'src/thirdparty/less-1.7.0.min.js'
                 ],
                 helpers : [
                     'test/spec/PhantomHelper.js'

src/index.html

@@ -46,7 +46,8 @@
 
     <!-- Pre-load third party scripts that cannot be async loaded. -->
     <!-- build:js thirdparty/thirdparty.min.js -->
-    <script src="thirdparty/less-1.4.2.min.js"></script>
+    <script src="thirdparty/less-config.js"></script>
+    <script src="thirdparty/less-1.7.0.min.js"></script>
     <script src="thirdparty/mustache/mustache.js"></script>
     <script src="thirdparty/jquery-2.1.0.min.js"></script>
     <!-- endbuild -->

src/thirdparty/less-config.js

@@ -0,0 +1,3 @@
+var less = {
+    logLevel: 2
+};

test/SpecRunner.html

@@ -38,7 +38,7 @@
   <script src="../src/thirdparty/jquery-2.1.0.min.js"></script>
   <script src="../src/thirdparty/mustache/mustache.js"></script>
   <script src="../src/thirdparty/path-utils/path-utils.js"></script>
-  <script src="../src/thirdparty/less-1.4.2.min.js"></script>
+  <script src="../src/thirdparty/less-1.7.0.min.js"></script>
   <script src="thirdparty/bootstrap2/js/bootstrap.min.js"></script>
 
   <!-- All other scripts are loaded through require. -->