Merged Kevin's changes with John's weekend update

Hey Kevin, I made a ton of changes to the HTML and CSS, and only a few to the js.  I have merged your changes.  Some of it was clean-up, but mostly I was putting in a responsive navbar, adding the millipede, updating graphics, etc.  Also I cleaned up your media queries...you had a lot of duplicated entries, which made it kinda hard to track all the updates when needed.  Made it so there is a base set of CSS and only think things that get changed are in the media queries.  Probably more could be done here.

There is also a temporary reset and cheat button on the Credits page.  You can preview the update here: http://clickgame2.azurewebsites.net/#

I have merged in your most recent commits (saving the inventory, updating the +1 animation).  

Should be an automatic merge at this point.  Hope I did not break anything without realizing it.