Added geofence ipython notebook

sim/geofence/README.md

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+## Design of the geofence
+
+There's some notes in a ipython notebook `geofence.ipynp` on
+this. This notebook is also used to calculate the deviation values.
+
+## Prerequisites
+
+```
+sudo apt-get install ipython libblas-dev liblapack-dev gfortran
+sudo pip install scipy matplotlib
+```
+
+We use basemap for map plotting. This was a fun install
+
+```
+sudo apt-get install libgeos-dev
+cd /usr/lib
+sudo ln -s libgeos-3.4.2.so libgeos.so
+sudo ldconfig
+sudo pip install basemap --allow-external basemap --allow-unverified basemap
+```
+
+You can check `libgeos` is dandy with `ld -lgeos --verbose`
+
+Yes you need a fortran compiler!!!
+
+## Python Usage
+
+`ipython notebook`