Merge pull request #29 from whosaysni/master

added translation for travel_info.html
update program page, CFP ends on 3/10.
add sponsor Tagtoo en info
add sponsor vpon info
add sponsor QSearch info
update keynote speaker Jessica intro, work on #28
add keynote speaker Stephan intro

All keynote speakers have introduction.
Photos will be upload in next several commits and may change layout.
Close #28.