RemixerView: validShells and showToolbar opts
Remixer: bugfix DOM crash.
Remixer: general toolbar events
updated athena lib
split editsummaryview out of summaryview
Remixer: move divider to editor.
Remixer: showSummary option
EditImageView
thumbnail default condition fixes
RemixerView: allow empty link option
EditSummaryView: use editImageView.