Mixins for readability of transitions added

To honor the DRY principle repeating patterns have been factored out.
In addition there was an anchor missing in README.md.

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index e748ca8..12ddea8 100644
--- a/README.md
+++ b/README.md
@@ -951,7 +951,7 @@ Reveal.initialize({
 Read MathJax's documentation if you need [HTTPS delivery](http://docs.mathjax.org/en/latest/start.html#secure-access-to-the-cdn) or serving of [specific versions](http://docs.mathjax.org/en/latest/configuration.html#loading-mathjax-from-the-cdn) for stability.
 
 
-## Installation
+## Installation<a id="installation"></a>
 
 The **basic setup** is for authoring presentations only. The **full setup** gives you access to all reveal.js features and plugins such as speaker notes as well as the development tasks needed to make changes to the source.