Reduce min-width of nav links

RDRT menu item wraps to second line: Reduce the min-width by 10px wraps all
navigation on one line
Locations have Start/End Dates (currently all with end_date != None are
filtered out of searches)
Merge branch 'master' of git://github.com/nursix/eden
Merge pull request #615 from arky/master

Reduce min-width of nav links
Twitter Search Results use location_id to be mappable