make embargo template theme-able

Use "Stanford-style" theming to enable you to put your own embargo
notice up.
Fix typo in transcripts_utils.
missing themed embargo page fails safely to unthemed
updated pdf viewer
Upgrade jsdraw input to latest version.
deleted old tinymce
new tinymce
js changes to support new tinymce
scss changes for alignments
Include all the controls on the toolbar that we previously had.
Changes to support Bulk e-mail usage.
adding new studio skin for TinyMCE4
Get handling of static image links working again.
Delete old Studio skin.
Version 1.3 of CodeMirror plugin.
Modify paths for location of CodeMirror files.
Fire events when CodeMirror Editor is open and closed.

Needed to switch static links back and forth.
Remove CodeMirror tabbed editor.
fixed tinymce visual editor css
Change how we detect that an image has been inserted.
made the codemirror look more studio-like
reordered the tinymce buttons