Added more ICCC commands

+ Added ICCC command for register a host
+ Added ICCC command for register a command i.e. listener
+ Added ICCC command for getting a number from NumGen

ICCC/RegisterThisHost2Database.go

@@ -0,0 +1,16 @@
+package ICCC
+
+import (
+	"github.com/SommerEngineering/Ocean/Tools"
+)
+
+// Function to register this server to the ICCC.
+func registerThisHost2Database() {
+	/*
+		Cannot use here the ICCC command to register this host.
+		Because, this host is maybe the first one. In that case,
+		there would be no server which can execute the ICCC command.
+		Therefore, every Ocean server registers the own host directly.
+	*/
+	registerHost2Database(Tools.ThisHostname(), correctAddressWithPort)
+}