Swap Waffles for Coins again...

This is in follow up to issue #117.  I found I was able to do it strictly with a git revert, but it was still good learning.

As discussed in that ticket, waffles have been being mistaken for coins.  The follow up discusion for the long term direction on this is at http://www.secretmaryo.org/phpBB3/viewtopic.php?f=1&t=9970

This reverts commit 9a8e04586cedcd94a467caa13aea607421150285.
It was found here: https://github.com/FluXy/SMC/commit/9a8e04586cedcd94a467caa13aea607421150285

Tested:
* Red coins in a played level
* Gold coins in a played level
* Red coin boxes in a played level
* Gold coin boxes in a played level
* Each of the above in an edited level
* Glanced at the image directories for png's and the drafts directory where the waffles svg was stored