move mercury-complete to be drozer-complete
update drozer-complete to interface with the new codebase correctly
allow the argparse completer to request additional arguments for a cli module
provide an implementation of get_completion_suggestions in the server cli module, to complete arguments that we can guess
add autocomplete suggestions for the 'drozer payload' command
adding completion support for the exploit cli builder, to help remind the user of available exploits and payloads