doc/web: Updated and extended documentation.
Updated description of subcommands aliasdelete and catchalldelete.
Added description of subcommands listaddresses, listaliases,
listrelocated and listusers.
.. |curr_vers_rel_date| replace:: The most current version of vmm is 0.6.0,
released on 28 June 2012.
.. |rel_hist| replace:: Older releases are listed in the :doc:`release_history`.