Add dotty graphs of the component hierarchy for Gb and RAN

These graphs show the component hierarchy and which ports of which
component are connected where.

Change-Id: I79badbcdbbf03d69de3a1a18241c7a9537c161bf
diff --git a/doc/ran_emulation_sccplite.dot b/doc/ran_emulation_sccplite.dot
new file mode 100644
index 0000000..cce29b1
--- /dev/null
+++ b/doc/ran_emulation_sccplite.dot
@@ -0,0 +1,39 @@
+digraph G {
+	rankdir = LR;
+	label = "RAN_Emulation when used with SCCPLite";
+
+	"RAN_ConnHdlr" [
+		shape = "record"
+		label = "<f0> RAN_ConnHdlr | <BSSAP> BSSAP | <BSSAP_PROC> BSSAP_PROC"
+	];
+
+	"RAN_Emulation_CT" [
+		shape = "record"
+		label = "<f0> RAN_Emulation_CT | <BSSAP> BSSAP | <RANAP> RANAP | <MGCP> MGCP | <CTRL> CTRL | <CTRL_CLIENT> CTRL_CLIENT | <CLIENT> CLIENT | <PROC> PROC"
+	];
+
+	"SCCP_CT" [
+		shape = "record"
+		label = "<f0> SCCP_CT | <MTP3_SCCP_PORT> MTP3_SCCP_PORT | <SCCP_SP_PORT> SCCP_SP_PORT"
+	];
+
+	"IPA_Emulation_CT" [
+		shape = "record"
+		label = "<f0> IPA_Emulation_CT | <MTP3_SP_PORT> MTP3_SP_PORT | <IPA_MGCP_PORT> IPA_MGCP_PORT | <IPA_RSL_PORT> IPA_RSL_PORT | <IPA_OML_PORT> IPA_OML_PORT | <IPA_CTRL_PORT> IPA_CTRL_PORT | <IPA_GSUP_PORT> IPA_GSUP_PORT | <IPA_RSPRO_PORT> IPA_RSPRO_PORT | <IPA_OSMO_PCU_PORT> IPA_OSMO_PCU_PORT | <IPA_SP_PORT> IPA_SP_PORT | <IPA_PORT> IPA_PORT"
+	];
+
+	"system" [
+		shape = "record"
+		label = "<f0> system | <IPA_CODEC_PORT> IPA_CODEC_PORT"
+	];
+
+	"RAN_ConnHdlr":BSSAP -> "RAN_Emulation_CT":CLIENT
+	"RAN_ConnHdlr":BSSAP_PROC -> "RAN_Emulation_CT":PROC
+
+	"RAN_Emulation_CT":BSSAP -> "SCCP_CT":SCCP_SP_PORT
+	"RAN_Emulation_CT":MGCP -> "IPA_Emulation_CT":IPA_MGCP_PORT
+	"RAN_Emulation_CT":CTRL -> "IPA_Emulation_CT":IPA_CTRL_PORT
+
+	"SCCP_CT":MTP3_SCCP_PORT -> "IPA_Emulation_CT":MTP3_SP_PORT
+	"IPA_Emulation_CT":IPA_PORT -> "system":IPA_CODEC_PORT
+}