remove media from gitignore
add demo video
Merge pull request #3 from jbraffoul/gh-pages-dev

add demo video
Fix in the last two cues plus english errors
Merge pull request #5 from marcussaad/gh-pages-dev

Fix in the last two cues plus english errors
Merge branch 'gh-pages' of https://github.com/jbraffoul/webvtt-presentation into gh-pages