Few fix in the SAIO doc:

- Fix the ubuntu isos urls
 - Removed trailing whitespaces
 - Correct the text that explain how to build the documentation

Change-Id: Ie19604d4586562dcef8c1d46addd14c15db2c442

doc/source/development_saio.rst

@@ -11,8 +11,8 @@ The virtual machine will emulate running a four node Swift cluster.
 
 * Get the *Ubuntu 10.04 LTS (Lucid Lynx)* server image:
 
-  - Ubuntu Server ISO: http://releases.ubuntu.com/lucid/ubuntu-10.04.2-server-amd64.iso (717 MB)
-  - Ubuntu Live/Install: http://cdimage.ubuntu.com/releases/lucid/release/ubuntu-10.04.2-dvd-amd64.iso (4.2 GB)
+  - Ubuntu Server ISO: http://releases.ubuntu.com/lucid/ubuntu-10.04.4-server-amd64.iso (717 MB)
+  - Ubuntu Live/Install: http://cdimage.ubuntu.com/releases/lucid/release/ubuntu-10.04.4-dvd-amd64.iso (4.2 GB)
   - Ubuntu Mirrors: https://launchpad.net/ubuntu/+cdmirrors
 
 * Create guest virtual machine from the Ubuntu image.
@@ -662,15 +662,16 @@ Setting up scripts for running Swift
   #. `cd ~/swift; ./.probetests` (Note: probe tests will reset your
      environment as they call `resetswift` for each test.)
 
-If you plan to work on documentation (and who doesn't?!):
+If you plan to work on documentation (and who doesn't?!) you must
+install Sphinx and then you can build the documentation:
 
 On Ubuntu:
-  #. `sudo apt-get install python-sphinx` installs Sphinx.
-  #. `python setup.py build_sphinx` builds the documentation.
+  #. `sudo apt-get install python-sphinx`
+  #. `python setup.py build_sphinx`
 
 On MacOS:
-  #. `sudo easy_install -U sphinx` installs Sphinx.
-  #. `python setup.py build_sphinx` builds the documentation.
+  #. `sudo easy_install -U sphinx`
+  #. `python setup.py build_sphinx`
 
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