Add possibility to provide version (#46)

ICCC/SystemMessages/ICCCGetVersion.go

@@ -0,0 +1,12 @@
+package SystemMessages
+
+// Requests the version from a Ocean server
+type ICCCGetVersion struct {
+}
+
+// Answer to the version request
+type ICCCGetVersionAnswer struct {
+	Kind    string // Ocean || Component
+	Name    string // Ocean: Hostname; Components: Name
+	Version string // The current version
+}

ICCC/SystemMessages/ICCCStartupMessages.go

@@ -4,9 +4,12 @@ package SystemMessages
 type ICCCOceanStartUpMessage struct {
 	PublicIPAddressPort string // The public web server's IP address and port
 	AdminIPAddressPort  string // The private admin server's IP address and port
+	OceanVersion        string // The current version of this server
 }
 
 // Message type for a startup message for external components:
 type ICCCComponentStartUpMessage struct {
 	IPAddressPort string // The component's ICCC IP address and port
+	Name          string // What is the name of this component?
+	Version       string // Which version is used?
 }