fix(future): fix modular build of futurestates
fix(future): fix modular build of futurestates

- missing reference to internalStates in core module, hidden by closure

fixes #151

phenomnomnominal/ui-router-extras,Sharondio/ui-router-extras,christopherthielen/ui-router-extras,jurrinus/ui-router-extras,platdesign/ui-router-extras,OpenWhere/ui-router-extras,viewthespace/ui-router-extras,Mindfor/ui-router-extras,hightower/ui-router-extras