#FEC-1627 #comment support silverlight embedded captions
update demo environment
fix embedded caption support
fix missing captions due to bad decoding
Revert "update demo environment"

This reverts commit c6f079fc59381dd8caea3a0265123e5e55bb085b.
update test page
remove remark
Merge branch 'slEmbeddedCaptions' into proxyPlayer

Conflicts:
	modules/KalturaSupport/tests/SilverlightMultiAudioTracks.html