[Ns-commits] docs: Add george's contributions

[code@nsnam-code.ece.gatech.edu]

user: Tom Henderson <tomh at tomh.org>
files: release/architecture.tex release/functional.tex release/introduction.tex release/node.tex release/ns3.sty release/ranvar.tex release/release.tex release/running.tex release/sample.tex release/simple.tex release/software.tex release/topology.tex release/trace.tex release/usecase.tex
url: http://code.nsnam.org/docs?cmd=changeset;node=4a416608870d11a1a6445e38266f8a4de4fbf177