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

improve error line

load PrivateValidator (with TODOs)
correction to GenesisFile loading

Move Pipe interface to definitions to avoid cyclical imports;
Improve ErisMint startState; genesisDoc assertion, documentation