add talk's video

#79
add talk's video
add talk's video
add waffle.io badge
Merge pull request #80 from waffle-iron/master

waffle.io Badge
new post
fix file name
remove header image
remove title
Update 2014-11-11-btconf-connecting-the-digital-to-analog.md
increase version
Merge branch 'release/1.11.0'
Merge branch 'master' into develop