Update README. Update version

Author: rbrtsmith

README.md

@@ -13,7 +13,7 @@ At the core of Nebula sits a highly flexible and and extendible grid system - ac
 
 It also ships with a few common and useful abstractions such as the Flag Object.
 
-Nebula is ultra lightweight with the default settings coming in at a tiny 5kb Gizpped.  This can potentially be even less if you decided to remove unwanted grid features for example.
+Nebula is ultra lightweight with the default settings coming in at a tiny 6kb Gizpped.  This can  be reduced even further by switching off features and removing items in the Sass maps.
 
 [View the demo](http://rbrtsmith.com/nebula-css/demo/)
 

demo/dist/main.css

@@ -6,3 +6,4 @@
 @import 'tools/offsets';
 @import 'tools/section';
 @import 'tools/visually-hidden';
+@import 'tools/hidden';

nebula-css/_tools.scss

@@ -3,3 +3,4 @@
 @import 'utilities/pull';
 @import 'utilities/spacing';
 @import 'utilities/text-align';
+@import 'utilities/misc';

nebula-css/_utilities.scss

@@ -0,0 +1,9 @@
+@mixin nb-hidden() {
+  @each $bp-key, $bp-value in $nb-breakpoints {
+    @include nb-respond-to($bp-key) {
+      .#{$nb-namespace}u-hidden\@#{$bp-key} {
+        display: none !important;
+      }
+    }
+  }
+}

nebula-css/tools/_hidden.scss

@@ -0,0 +1,8 @@
+.#{$nb-namespace}u-hidden {
+  display: none !important;
+}
+@include nb-hidden;
+
+.#{$nb-namespace}u-visually-hidden {
+  @include nb-visually-hidden(true);
+}

nebula-css/utilities/_misc.scss

@@ -1,6 +1,6 @@
 {
   "name": "nebula-css",
-  "version": "2.0.1",
+  "version": "2.1.0",
   "description": "ITCSS and BEMIT based framework that is ultra exensible and scales to any project size",
   "main": "index.js",
   "scripts": {