Adapt Marionette atoms so they can be used with Cu.import without designated scope
Log stacktrace

Adds more info on catch to be put into the log instead of just
console.  This will help debug issues when one has access to grid
hub log but no access to console.

Removes now superfluous t.printStackTrace().

Signed-off-by: Andreas Tolfsen <ato@mozilla.com>
Removing deprecated classes