Setting number of images now works and doesn't always default to 6.
jQuery visualCaptcha front-end version updated to 0.0.5.
Install instructions now include Nginx and Apache instructions for the slim app's URL rewrite.

git-svn-id: https://plugins.svn.wordpress.org/visualcaptcha/trunk@1018007 b8457f37-d9ea-0310-8a92-e5e31aec5664