The parameter that can be used to have future *and* past events in the rss feed is renamed to `future`

RSS feeds can be easily parsed and hence can be used to populate program for
events with the proper tags. By adding the 'showall=true' to the query string,
it is possible to see all events corresponding to the requested criteria in
the RSS feed, whether past or future and more than 20.

Signed-off-by: Geneviève Bastien <gbastien@versatic.net>

Organisations can now have a detailed place name and address, plus a specific geocoded localisation. Refs #71

Space, quote and asterisk are replaced with a dash. Colons are removed.

Close #3