Merge pull request #209 from MSOpenTech/dynamic-support

Bug fix and chrome workaround for Caption fallbacks
include ftyp in init segment
fix end to include the moov
Merge pull request #210 from MSOpenTech/ftyp

include Ftyp in init segment
updated sources.json
Merge pull request #211 from MSOpenTech/updatesources

updated sources.json
update 4K url
Merge pull request #212 from MSOpenTech/updatesources

update 4K url
fixes timeline calculations for the case where start of Period is not zero
adds a chart for tracking manifest updates
fixes availability window calculation for SegmentList
fixes presentation to media and media to presentation time conversions
fixes segment generation for SegmentTemplate
fixes actual start time calculation
fixes audio/video stats updates
fixes metrics for 'Manifest update info' chart
fixes ABR issues for multi-period