Updated README, bumped version

Bumped version after adding support for koa-unless

Bumped to 1.0.0 since the change from ctx.user to ctx.state.user will…

… break existing code

Switched to ctx.state.user; Export unthunked JWT functions

Updated jsonwebtoken dep; Bumped version

Updated jsonwebtoken dep to 4.2.2 to fix security issue

Bumped version; Added michaelwestphal as contributor