add documentation

lib/interrupt.js

@@ -53,6 +53,7 @@ class Interrupt extends EventEmitter {
 
   }
 
+  // manual firing for testing
   fire(name = 'fired') {
     this.emit(name, this.hook)
   }
@@ -85,6 +86,11 @@ class Interrupt extends EventEmitter {
   }
 
   start() {
+    this.inter(port).on('fired', () => {
+      console.log(`interrupt port ${port}  hook me \n ${relays}`)
+        // hook.bind(this)(port)
+
+    })
     return this.clear().then(() => this.poller.add(this.valuefd, Epoll.EPOLLPRI | Epoll.EPOLLONESHOT));
   }