Ping / circuit latency, break out commands, add typing function for IM, add thinkingTime and charactersPerSecond parameters to typing functions

dist/classes/Circuit.js

@@ -133,7 +133,8 @@ class Circuit {
             this.awaitingAck[packet.sequenceNumber] =
                 {
                     packet: packet,
-                    timeout: setTimeout(this.resend.bind(this, packet.sequenceNumber), 1000)
+                    timeout: setTimeout(this.resend.bind(this, packet.sequenceNumber), 1000),
+                    sent: new Date().getTime()
                 };
         }
         let dataToSend = Buffer.allocUnsafe(packet.getSize());
@@ -162,6 +163,19 @@ class Circuit {
         ];
         this.sendMessage(msg, 0);
     }
+    getOldestUnacked() {
+        let result = 0;
+        let oldest = -1;
+        const keys = Object.keys(this.awaitingAck);
+        keys.forEach((seqID) => {
+            const nSeq = parseInt(seqID, 10);
+            if (oldest === -1 || this.awaitingAck[nSeq].sent < oldest) {
+                result = nSeq;
+                oldest = this.awaitingAck[nSeq].sent;
+            }
+        });
+        return result;
+    }
     expireReceivedPacket(sequenceNumber) {
         if (this.receivedPackets[sequenceNumber]) {
             delete this.receivedPackets[sequenceNumber];