replaced generic masculine speaker heads with pictures of rackers giving talks. text may be clearer.
add schedule text
added speech bubbles
Merge pull request #5 from diN0bot/scheduleblock

add schedule text
moved schedule text into tabified view
Merge pull request #4 from diN0bot/speakerblock

speaker block improvements
cleaned up speaker images, and added text for new speakers
replaced some of the speaker images
remove bubbles on phones