now jwtauthpolicy accepts a groupfinder callback
added groups array-type to user model through a type decorator (array type not supported by all sql implementations. eg: sqltype), implemented a real sql query for groupfinder callback, initialize script with a default group
updated todo checklist
put in place a basic root_factory
fixed implementation arraytype for sqlite (TODO: replace with a groups table)
Switch to pip so we can use rest_toolkit from github.