upgrade reveal.js in attempt to fix youtube iframe issue; no luck
add pose-estimation video

A custom CSS hack was required to make it hide properly when the
slide containing it is not active. "data-state" add a class to the
document (<html> tag).
add hardware pic and some TODOs to presentation
Merge branch 'master' of github.com:cberzan/drones-287
include guards please
parse cmd-line args using boost