add building name field
remove incorrect use of iso week-year for dates
Improve location, cost, source, comment and date searchability
switch to OR search, ordering results by score by default
add partial search matching (edgengrams)
fix wrong field type for building_name
add extra filtering and searching to Gig, Venue and Location admin pages
Apply new skin to most of front page.
Home page and main search page mostly done.
Rearrange columns of search results.
Merge branch 'vskin' of https://github.com/stevage/gigs into vskin