start of emulation chapter in manual

doc/manual/Makefile

@@ -6,7 +6,16 @@ CONVERT = convert
 CSS = --css-include=manual.css
 SPLIT = --split section
 
-DIA_SOURCES = internet-node-send.dia internet-node-recv.dia packet.dia node.dia buffer.dia sockets-overview.dia
+DIA_SOURCES = \
+	internet-node-send.dia \
+	internet-node-recv.dia \
+	packet.dia \
+	node.dia \
+	buffer.dia \
+	sockets-overview.dia \
+	testbed.dia \
+	emulated-channel.dia
+
 DIA_EPS = ${DIA_SOURCES:.dia=.eps}
 DIA_PNG = ${DIA_SOURCES:.dia=.png}
 DIA_PDF = ${DIA_SOURCES:.dia=.pdf}

doc/manual/emulation.texi

@@ -0,0 +1,28 @@
+@node Emulation
+@chapter Emulation
+@anchor{chap:Emulation}
+
+ns-3 has been designed 
+
+@float Figure,fig:testbed
+@caption{Implementation overview of testbed.}
+@image{figures/testbed}
+@end float
+
+@float Figure,fig:emulated-channel
+@caption{Implementation overview of emulated channel.}
+@image{figures/emulated-channel}
+@end float
+
+@section Behavior
+
+Blah, blah.
+
+@section Usage
+
+Yadda yadda
+
+@section Implementation
+
+Mumble blah
+