remove dead code
poster plugin: add poster param
html5 video plugin: close #8
html5 video plugin: remove dead code
playback plugins: close #30
hls playback plugin: fixes #31
watermark: add position capability (closes #9)
add dependency status badge
container: add specs
media control: remove console.log
utils: add method to left pad a number with zeroes up to a given size
playback handler: add hash signing methods