title: custom values in slider input shiny
body: <p>I want to use slider input (with animation) and move through years (1600-2013) in my dataset. The problem is that my data is heavily negatively skewed which is why I want to customize the 'step' incrementation inside my slider input. That means, I want something like </p>
  
  <pre><code>sequence &lt;- c(1600,1700,1750,1800,1850,1900,1930,1950,1960,1970,1980,1990,1995,
               2000,2001,2003,2005,2006,2008,2009,2010,2011,2012,2013)
  </code></pre>
  
  <p>instead of </p>
  
  <pre><code>sequence &lt;- seq(1600,2013,by=1)
  </code></pre>
  
  <p>if the step size = 1.</p>
  
  <p>Is there a way ?</p>