Moved default serialization to ApplicationJson

It was always using Json since Xml was removed a few months ago, but the
defaults were still in place (then falling back to Json later). Same
functionality, it's just more explicit.
Bubbled commands from push events to potato controller
Added VariablesSetF list overload to CommandBuilder
Added variable for inclusive event name support
#64 Added inclusive names to optimize event output
Re-protected event handler
#64 Added single command and test to setup event stream
#64 Removed Variables Get/Set from stream
Moved variable controller to concurrent dictionary

Amazing that I didn't run into problems until now.