add version parameter to foursquare API request

as of January 28, 2014 foursquare will drop support for API requests
without a version `v=YYYYMMDD` parameter

more: https://developer.foursquare.com/overview/versioning
Merge branch 'foursquare-api-fix' into furkot-v0.4.5
Release 0.4.5-furkot-2