model+apps+utils+examples+ci+docs: Update code for changes in ns-2.23

- Replace removed RandomVariable with RandomVariableStream
- Replace deprecated usages of AddTraceSource
- Update changed LogComponent interface

ci: This commit also integrates a script for Jenkins and Travis CI to
clone NS-3 and pybindgen repositories, so the code can be built.

docs: Update to reflect new home of ndnSIM and related sources

Change-Id: Ic14e1269bf15366b0041fd670c577053b6704dc7
Refs: #3122, #3123
diff --git a/.jenkins.d/20-tests.sh b/.jenkins.d/20-tests.sh
index 01ce1a2..cd1d39f 100755
--- a/.jenkins.d/20-tests.sh
+++ b/.jenkins.d/20-tests.sh
@@ -5,9 +5,13 @@
 JDIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
 source "$JDIR"/util.sh
 
+pushd ns-3 >/dev/null
+
 # Run unit tests
 if [[ -n "$XUNIT" ]]; then
-    ./build/src/ndnSIM/tests/ns3-dev-ndnSIM-unit-tests-debug --log_format=XML --log_sink=build/xunit-report.xml --log_level=all --report_level=no
+    ./waf --run "ndnSIM-unit-tests --log_format=XML --log_sink=build/xunit-report.xml --log_level=all --report_level=no"
 else
-    ./build/src/ndnSIM/tests/ns3-dev-ndnSIM-unit-tests-debug -l test_suite
+    ./waf --run "ndnSIM-unit-tests -l test_suite"
 fi
+
+popd >/dev/null