config: prepare for FOSDEM 2015
sponsors: reset for 2015

Delete all sponsors (except ULB for obvious reasons) until we know who
our sponsors next year will be.  Negotiations are in progress.  We can
easily resurrect previous years' content from Git if we need it.
news: remove 2014 olds

Leave the last three items like last year so the front page doesn't look
completely empty.  They'll scroll out of sight soon enough.
interviews: remove 2014 interviews
keysigning: provisional dates for 2015
content: reset for 2015

Drop stale pages from this year to avoid spreading disinformation and
cull links to empty pages generated by content from Pentabarf.
layout: fix representation of dates for 2015
logo: update for 2015
style: new home visual for 2015

Original photo by forresto:

  https://www.flickr.com/photos/forresto/12269931514

This derrivative licensed CC-BY with permission from the artist.

Derrivative version under the terms of CC-BY with
content: cull more stale information from this year
content: fix some awkward capitalisation
sponsors: Google will sponsor FOSDEM 2015
sponsors: Colt will sponsor FOSDEM 2015
style: add credits to home visual
news: first call for participation
sponsors: O'Reilly will sponsor FOSDEM 2015