moves the event entry form to a dropdown from the navbar

@jeffstrickler I moved the event entry form to a dropdown form in the navbar. It is not a full screen dropdown, but the size can be adjusted. I also included a 'recently entered' box on the dropdown. The entries on there right now are hard coded in, but when I get the event retrieval working, I will populate this section with actual data.  
I also did some cleanup by moving the js in the homepage.ejs file out to main.js  
Let me know what you think.