event-waiting code in client and other miscellaneous fixes.

Signed-off-by: Silas Davis <silas@monax.io>

and configure commands (providing chain making and logging
configuration), and make 'burrow serve' the root command.
Use a single marshallable config structs, introduce cascade of config
sources for file-based, environment-based canonical configuration.

Signed-off-by: Silas Davis <silas@monax.io>

licence: remove various GPLv3 copyright headers;

event_new: remove unused package that had been copied for discussion

monax: lingering eris -> monax company rename

licence: last pass, further cleanup