darc-0.3.48 is available

[jacob martinson]

Changes -

* 0.3.48 - Added support for automatically populating
~/.ssh/known_hosts with ssh-keyscan if needed.
* 0.3.47 - Bugfix - unhandled exception was generated when newdb was
missing @@end_db line
* 0.3.46 - Bugfix - html typos in report when the 'failed hosts'
section was present
* 0.3.45 - Added mail_from config option to set the from address in
report emails

I added more content to the installation guide -
http://icculus.org/projects/darc/install_guide/

and additional documentation on the darc config file -
http://icculus.org/projects/darc/the_config_file/