Fixed issue #424: Accessibility improvements - changes are related to the
bookmarks list
Merge branch 'master' of https://github.com/mzedeler/LYT
Added period (tiny fix).
Added comments.
Fixed issue #469: Modernizr test isPlayBackRateSupported always return
true
Merge remote-tracking branch 'ybk/master'

Conflicts:
	src/support/modernizr/playbackrate.coffee
Fixed error that caused the player to display duplicates of the same content in books where the same content was referred to by muliple adjacent segments.
Fixed issue that caused the player to fail finding a matching segment while seeking.
Fixed stack rendering issue.
Made logging in updateHtml work with the developer console.
Factored out renderTranscript.