First pass at events almost buttoned up.

The goal is to get the members list to update when new users enter and leave the party.

Aurora/Proto/events.proto

@@ -0,0 +1,51 @@
+syntax = "proto3";
+
+package Aurora.Proto.Events;
+
+import "Proto/general.proto";
+import "Proto/party.proto";
+
+service RemoteEventService {
+    //Party Service
+    rpc GetEvents(Aurora.Proto.General.Empty) returns (stream BaseEvent) {};
+    rpc SubscribeToEvents(SubscribeRequest) returns(SubscriptionResponse);
+    rpc UnsubscribeFromEvents(UnsubscribeRequest) returns (SubscriptionResponse);
+    rpc UnsubscribeFromAll(UnsubscribeAllRequest) returns (SubscriptionResponse);
+}
+
+/* Subscription messages */
+message SubscribeRequest {
+    repeated EventType eventTypes = 1;
+}
+
+message UnsubscribeRequest {
+    repeated EventType eventTypes = 1;
+}
+
+message UnsubscribeAllRequest {
+}
+
+message SubscriptionResponse {
+    bool successful = 1;
+}
+
+/* Event Types */
+enum EventType {
+    PartyMemberJoined = 0;
+    PartyMemberLeft = 1;
+}
+message BaseEvent {
+    EventType eventType = 1;
+    oneof derivedEvent {
+        PartyMemberJoinedEvent partyMemberJoinedEvent = 2;
+        PartyMemberLeftEvent partyMemberLeftEvent = 3;
+    }
+}
+
+message PartyMemberJoinedEvent {
+    Aurora.Proto.Party.PartyMember member = 2;
+}
+
+message PartyMemberLeftEvent {
+    Aurora.Proto.Party.PartyMember member = 2;
+}