Bumped version to 1.7.3.RC1
EmbedPlayer (Core): Ignore play requests for restricted content
Fixes QC #6935
add widevine onPage plugin
added html sample page to widevineMediaOptimizer
update manifest to support widevine attributes
change plugin id
remove redundant alerts from widevineMediaOptimizer
Update includes/DefaultSettings.php

update version
merge
Merge branch 'master' into 1.7.3_March_3rd
kWidget: Add Error Check for kWidget.thumbEmbed missing target
AccessControl follow up to: c6a2946fd2995f95f8561e3ad39af435535be2fc 

* stop on error, not ac property which can be populated for preview
players
* added thumbEmbed example to AccessControlCustomMessage test file
Merge branch '1.7.3_March_3rd'