First attempt to move audio logic to separate command classes.
Basic plumbing for player commands underway. Defunct. Work in progress.
Fixed a reference bug causing 'this' to get lost.
Merge branch 'master' into play-controllers
Work in progress: basic playing working but many bugs.
Added documentation and made the attach and detach methods private.
issue #519: Version lyt-1.2.0_018 - no read speed on iPhone or IOS safari - fixed bug related to safari
Updated changelog.
Fixed issue #522: Version lyt-1.2.0_018 on IE8. Searching fails.
Merge remote-tracking branch 'ybk/master'

Conflicts:
	src/controllers/player.coffee
Disabling use of Modernizr.playbackrate: too many false negatives.
Version number bump.
Merge branch 'master' into play-controllers
More playback related bugfixes.
Moved timeupdate logic to progress callback.
Very large refactoring of load() and playSegmentOffset() methods.
Very large refactoring of load() and playSegmentOffset() methods.
Clearing up book loading in load() method.

Trying to debug "Loading book" message - still not working.
Removing unnecessary comment (this can be handled by the then() method in jQuery.Deferred().
Fixed bug in load() method on player.