Merge pull request #23 from yaegerbomb/master

Updated readme.md with documentation of keep-alive

README.md

@@ -16,6 +16,9 @@ In order to use a directive add attribute <code>ng-slide-down</code> to an eleme
 #### Lazy rendering
 Has option to prevent HTML generation of contents unless expanded (due to performance considerations). Optimal for a big number of widgets (production tested).
 All you need to do is to add <code>lazy-render</code> attribute to an element with a directive.
+###### Keep Alive
+Additionally, if you need to keep the contents of the expand and collapse from recompiling after the initial expand takes place, adding <code>keep-alive</code> will prevent re-rendering 
+of the html template. This is usefull if you are expanding / collpasing content that may contain directives / components that makes API calls on initializtion.
 #### Automatic height adjustment
 Directive watches for a height of it's content and readjusts it's size automatically - no extra work required. 
 ## Options
@@ -36,6 +39,12 @@ Easing function (`transition-timing-function`) to use in the animation (default
 Add this attribute to prevent rendering when content is hidden. Doesn't require value.
 
 <code>&lt;div ng-slide-down=&quot;slideDown&quot; lazy-render&gt;</code>
+
+#### keep-alive
+Add this attribute to prevent recompiling of content in the template. Useful for content that may contain addition directives / components that receive data from an API.
+
+<code>&lt;div ng-slide-down=&quot;slideDown&quot; lazy-render keep-alive&gt;</code>
+
 #### on-close
 Expression evaluated when slider is finished closing