Updated docs with new pull request z-index implementation. Publishing new release

Author: hazzo

README.md

@@ -61,11 +61,14 @@ If you want a custom color just pass a color parameter as `string`. It's best if
 <div v-ripple="'rgba(255, 255, 255, 0.35)'"  class="button">I have different color</div>
 ```
 
-You can also set the default color for all your ripples like follows
+##  Global settings
+
+You can set the default color and z-index for all your ripples as the following example
 
 ```
 import Ripple from 'vue-ripple-directive'
 
 Ripple.color = 'rgba(255, 255, 255, 0.35)';
+Ripple.zIndex = 55;
 Vue.directive('ripple', Ripple);
 ```