created talk post
Merge pull request #37 from mgaut72/master

add steven's talk on vr
added fall 14 big data talk
added big data talk
Merge branch 'master' of https://github.com/lnanglin/uofa-acm.github.io into lnanglin-master
minor fixes to talk description
git push origin masterMerge branch 'lnanglin-master'