Simplify the example code on the main page of Sailfish documentation.
Add node_type to the list of modules from which documentation is generated.
Update sidebar links.
Fix some documentation in the node_type module.
Update layout and version.
Minor changes in the installation section.
Add Sailfish posters and release notes for 2013.1.
Reorganize the cluster documentation.
Make InfiniBand section separate from LSF.
Move boundary condition documentation directly to node_type docstrings.