Added an inline script to detect installation as a plugin.
Added an inline script to detect installation as a plugin.

Script sniffs for "/_plugin/" in location.href. If found it will
automatically populate the REST endpoint and simulate clicking
the "Connect" button.

lukas-vlcek/bigdesk,AIsaac08/bigdesk,siye1982/bigdesk,crate/bigdesk,node/bigdesk,swimmingsand/bigdesk,AlphaStaxLLC/bigdesk,AIsaac08/bigdesk,marsmensch/bigdesk,AlphaStaxLLC/bigdesk,siye1982/bigdesk,swimmingsand/bigdesk,lukas-vlcek/bigdesk,marsmensch/bigdesk,node/bigdesk