title: How to apply a theme to a bootply project?
body: <p>This maybe a naive question - but I am stuck.
  I have created a simple (my first) bootply project.
  One can access it here: <a href="http://www.bootply.com/sRefcMualY" rel="nofollow">http://www.bootply.com/sRefcMualY</a></p>
  
  <p>I wish to "style" this bootstrap project using the free theme "Slate", available here:
  <a href="http://bootswatch.com/slate/" rel="nofollow">http://bootswatch.com/slate/</a></p>
  
  <p>I have had no success in "applying" the theme to my project! Copying the css into the css window works in design mode, but is rejected if I try and save it.</p>
  
  <p>It must be something silly and easy - but I am stumped!</p>
  
  <p>Thanks in advance.</p>