Realtime tweets
Tweaking HTML meta elements keywords and description
Add z-index to header

Without this change, the map overlaps with the header when scrolling.
Clarify in-place payments
track locations
August Penguin 2013 has videos! ☺
August Penguin 2013 has slides!
Fix link to ik5's slides
Merge branch 'ap2013-video' of github.com:tomer/AugustPenguin into ap2013-video