Added CKEditor 4.4.5 standard.
Merge remote-tracking branch 'upstream/standard/4.4.x'
UF-1236 allow all file mimetypes in passage widget.
UF-1236 set widget contentType for existing passage.
UF-1280 add colorbutton, oembed, and panelbutton plugins.
UF-1280 fix unimplemented alignment feature in oembed plugins.
UF-1208 update content modal message to show only YouTube.
Merge remote-tracking branch 'origin/UF-1280-color-oembed'
textEntryInteraction plugin: Initial development
textEntryInteraction plugin: Work-in-progress
textEntryInteraction plugin: Work-in-progress
textEntryInteraction plugin: Work-in-progress
textentryinteraction-dialog: Attention to dialog focus and tab order
textentryinteraction: Data-passing fixes
inlinechoiceinteraction: Initial development
inlinechoiceinteraction: Work-in-progress
inlinechoiceinteraction: Work-in-progress
inlinechoiceinteraction: Work-in-progress
inlinechoiceinteraction: Work-in-progress