Declutter the page

I had some spare time and so I decided to greatly declutter the current page and make the most important information stand out.

I've talked to a lot of folks around, their biggest critique was:

 - Too much outdated information
 - Date + Place do not stand out
 - General Appearance: Meetup is not taking place anymore.

Summary of changes:

 - Throw away old pages and content
 - Move footer content to sidebar 
 - Put all information into a single place

This is already a great improvement – however there's still a lot to do – like

 - add proper fonts and styling
 - refactor html / js / css mess
 - add call to action button for "submit talk" (and explain how to do)
 - make sidebar static, optimize page for mobile

![bildschirmfoto 2013-06-19 um 16 04 33](https://f.cloud.github.com/assets/1471561/675078/60bf480a-d8e9-11e2-892a-d2221c574965.png)