Update ubuntu doc for 13.10

doc/install_ubuntu.txt

@@ -3,8 +3,8 @@
 Easy Installation of an optimized Theano on Ubuntu
 ==================================================
 
-These instruction was done for Ubuntu 11.04, 11.10 and 12.04. You can
-probably do something similar on older computer.
+These instruction was done for Ubuntu 11.04, 11.10, 12.04, 12.10, 13.04
+and 13.10. You can probably do something similar on older computer.
 
 .. note::
 
@@ -49,7 +49,7 @@ probably do something similar on older computer.
 Installation steps
 ~~~~~~~~~~~~~~~~~~
 
-Ubuntu 11.10/12.04/12.10/13.04:
+Ubuntu 11.10/12.04/12.10/13.04/13.10:
  1) ``sudo apt-get install python-numpy python-scipy python-dev python-pip python-nose g++ libopenblas-dev git``
  2) ``sudo pip install Theano``
 
@@ -236,15 +236,4 @@ Test GPU configuration
 
    Ubuntu 12.10: default gcc version 4.7.2. gcc 4.4.7, 4.5.4 and 4.6.3 availables.
 
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+   Ubuntu 13.10: default gcc version 4.8.1. gcc 4.4.7, 4.6.4 and 4.7.3 availables.