Major update - symmetric encryption, UDP hole punching, code cleanup.

Reviewed-on: #1

m/models.go

@@ -2,28 +2,25 @@
 package m
 
 type PeerConfig struct {
-	PeerIP      byte
-	HubAddress  string
-	Network     []byte
-	APIKey      string
-	PublicIP    []byte
-	Port        uint16
-	Mediator    bool
-	EncPubKey   []byte
-	EncPrivKey  []byte
-	SignPubKey  []byte
-	SignPrivKey []byte
+	PeerIP     byte
+	HubAddress string
+	Network    []byte
+	APIKey     string
+	PublicIP   []byte
+	Port       uint16
+	Relay      bool
+	PubKey     []byte
+	PrivKey    []byte
 }
 
 type Peer struct {
-	PeerIP     byte
-	Version    int64
-	Name       string
-	PublicIP   []byte
-	Port       uint16
-	Mediator   bool
-	EncPubKey  []byte
-	SignPubKey []byte
+	PeerIP   byte
+	Version  int64
+	Name     string
+	PublicIP []byte
+	Port     uint16
+	Relay    bool
+	PubKey   []byte
 }
 
 type NetworkState struct {