Update readme with connectors API
Update readme with connectors API

Rastopyr/PromisePipe,netProgrammer/PromisePipe,netProgrammer/PromisePipe,edjafarov/PromisePipe,SilentImp/PromisePipe,Rastopyr/PromisePipe,SilentImp/PromisePipe,edjafarov/PromisePipe