Added basic mixins and tests

extras/animation.less

@@ -0,0 +1,23 @@
+.animation(@value) {
+  -webkit-animation: @value;
+  -moz-animation: @value;
+  -ms-animation: @value;
+  -o-animation: @value;
+  animation: @value;
+}
+
+.transition(@value) {
+    -webkit-transition: @value;
+    -moz-transition: @value;
+    -o-transition: @value;
+    -ms-transition: @value;
+    transition: @value;
+}
+
+.transform(@value) {
+  -ms-transform: @value;
+  -moz-transform: @value;
+  -webkit-transform: @value;
+  -o-transform: @value;
+  transform: @value;
+}

extras/layout.less

@@ -0,0 +1,15 @@
+.absolute() {
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  padding: 0;
+  margin: 0;
+}
+
+.box-sizing(@value: border-box) {
+  -webkit-box-sizing: @value;
+  -moz-box-sizing: @value;
+  box-sizing: @value;
+}

extras/shadows.less

@@ -0,0 +1,5 @@
+.box-shadow(@value) {
+  -webkit-box-shadow: @value;
+  -moz-box-shadow: @value;
+  box-shadow: @value;
+}

index.less

@@ -0,0 +1,3 @@
+@import 'extras/animation';
+@import 'extras/layout';
+@import 'extras/shadows';

package.json

@@ -5,7 +5,8 @@
   "main": "index.less",
   "scripts": {
     "test": "npm run build",
-    "build": "lessc --silent index.less build.css && cleancss -d --s0 -o build.css build.css",
+    "build": "lessc --silent index.less build.css",
+    "test": "lessc --silent index.less build.css && cleancss -d --s0 -o build.css build.css",
     "clean": "rm -rf node_modules/ build.css"
   },
   "repository": {

test.less

@@ -0,0 +1 @@
+@import 'index.less';