Fix instructions in README

The repository should work for ndnSIM 2.1+ (checked with ndnSIM 2.3)

README.md

@@ -5,21 +5,31 @@ Custom version of NS-3 and specified version of ndnSIM needs to be installed.
 
 The code should also work with the latest version of ndnSIM, but it is not guaranteed.
 
-    mkdir ns-dev
-    cd ns-dev
+    mkdir ndnSIM
+    cd ndnSIM
 
-    git clone git://github.com/cawka/ns-3-dev-ndnSIM.git ns-3
-    git clone git://github.com/cawka/pybindgen.git pybindgen
-    git clone git://github.com/NDN-Routing/ndnSIM.git ns-3/src/ndnSIM
-
-    git clone git://github.com/cawka/ndnSIM-scenario-template.git my-simulations
+    git clone https://github.com/named-data-ndnSIM/ns-3-dev.git ns-3
+    git clone https://github.com/named-data-ndnSIM/pybindgen.git pybindgen
+    git clone --recursive https://github.com/named-data-ndnSIM/ndnSIM.git ns-3/src/ndnSIM
 
+    # Build and install NS-3 and ndnSIM
     cd ns-3
     ./waf configure -d optimized
     ./waf
     sudo ./waf install
 
-    cd ../my-simulations
+    # When using Linux, run
+    # sudo ldconfig
+
+    # When using Freebsd, run
+    # sudo ldconfig -a
+
+    cd ..
+    git clone https://github.com/named-data-ndnSIM/scenario-template.git my-simulations
+    cd my-simulations
+
+    ./waf configure
+    ./waf --run scenario
 
 After which you can proceed to compile and run the code
 
@@ -100,4 +110,3 @@ Available simulations
 ---------------
 
 Description
-