update ubuntu installer

fail on first error
avoid multiple invocations of apt-get

setup_ubuntu.sh

@@ -1,16 +1,7 @@
-#!/bin/sh
-apt-get install libpng-dev
-apt-get install libfreetype6 libfreetype6-dev
-apt-get install python-dev
-apt-get install python-simplejson
-apt-get install python-qt4
-apt-get install python-numpy python-scipy python-matplotlib
-apt-get install libgeos-dev
-apt-get install python-shapely
+#!/bin/sh -e
+
+apt-get install libpng-dev libfreetype6 libfreetype6-dev python-dev python-simplejson python-qt4 python-numpy python-scipy python-matplotlib libgeos-dev python-shapely python-pip libspatialindex-dev
 easy_install -U distribute
-apt-get install python-pip
-pip install --upgrade matplotlib
-pip install --upgrade Shapely
-apt-get install libspatialindex-dev
+pip install --upgrade matplotlib Shapely
 pip install rtree
-pip install svg.path
+pip install svg.path