adds bearer token support for PlayReady protection system
fixes segment index calculation caused by javascript floaing point problem
Merge pull request #282 from MSOpenTech/development

Contains a fix for #281, adds bearer token support
fixes DVR window calculations for SegmentTimeline streams
sets live edge to the end of the last described segment instead of its start time
Merge pull request #284 from MSOpenTech/development

fixes DVR window calculations for SegmentTimeline streams