switching to circleci 2.0

Remove hell since factored out and improved on in https://github.com/silasdavis/glide-lock-transitive

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

Change case convention for permissions contract to match solidity style guide, add missing godoc comments, automate signature test

Refactor templating to util, move 'Solidity' types to a more proper abi package, improve documentation of permissions snatives and improve argument and return types

introduce directory relates filesystem functions in /util; inspired by common but debugged