single apt-get command in install-ubuntu-packages

Author: logicabrity

bin/install-ubuntu-packages.sh

@@ -1,4 +1,7 @@
 # required to compile fidimag
-apt-get install python-pip python-numpy python-dev python-scipy cmake
-# required for tests and running it
-apt-get install python-pytest python-pyvtk ipython python-matplotlib
+deps_compilation="python-pip python-numpy python-dev python-scipy cmake"
+
+# required for tests and running fidimag
+deps_live="python-pytest python-pyvtk ipython python-matplotlib"
+
+apt-get install $deps_compilation $deps_live