Precompile Error Rake Aborted
===

I'm having a trouble getting my application to render on Heroku. Here are the details:
 
After the command:
    **git push heroku master**

    ![problem][1] http://i.stack.imgur.com/ZVv4i.png
    

I run **heroku logs**:

    ![problem][2] http://i.stack.imgur.com/MN5ia.png


  [1]: http://i.stack.imgur.com/ZVv4i.png
  [2]: http://i.stack.imgur.com/MN5ia.png

I'm doing my homework on precompile errors, but I'm certain that I don't really *understand* the error to deduce a solution -- guidance is greatly appreciated! 