HTML formatting and Meetup.com API

I added some Twitter Bootstrap dependencies and formatting. Created a navbar header and sections containing About Us, Upcoming Meetups (using Meetup.com API), Topic Picker (From Josh), and Sponsors.

I kept getting an error on the Topic Picker that the table topics didn't exist. Wasn't sure if I was supposed to create manually or if I was just still missing dependency for composer or something. 

I'm new to using Github so I'm not certain if I'm even doing this all correctly. Just wanted to submit what I had so far. Looking forward to working some more and at the next Hack Night