Fixing bunch of stuff

Overall - Bringing the code up to modern standards and best practices.

clicky.js - Dramatically cleaned up code, promoting consistency and replacing vanilla JS with jQuery where appropriate. Add click handlers and move loop to DOM ready. Fixed bombs.

clicky.css - Replace the multiple button ID selectors with just a plain old button selector. Don't know why the IDs were used before; that doesn't really make sense at the moment. Maybe if other buttons are added that aren't going to use pointers it will be appropriate to use ID selectors.

clicky.html - Gave more descriptive ID names, improved consistency in markup, moved script tags to bottom of body, cleaned up img tags and gave alt text (dat accessibility)