Added an explanation about how to upgrade the database version schema and fixtures, both
from the developer point of view and from the sysadmin point of view.
When run without any parameter, show a help message to leave clear that it's not doing anything
Remove the deploy call that was making upgradedb.
Fix an issue with upgradedb that was making it fail when run with
--prepare_upgrade and no database instance (which shouldn't be needed,
and now isn't)
upgradedb now shows the help message if run without parameters
Remove empty spaces at the end of some lines
Filter in job list to get rid of old stuff
Tidying up the code
More cosmetic changes in the source code
Merge pull request #20 from miska/master

Support setting url in config
Redo documentation

Document how to get some instance up and running and start the other sections
of documentation as well. No more one big document, but several separate
documents.