barrier=fence shouldn't be an area (fixes #2158)
various updates to presets

  Add "crop" field for landuse=farm/farmland/farmyard (for #2149)
  Add "trees" field for landuse=orchard
  Add landuse=landfill
  Add the hoops=* field to the basketball preset (for #1984)
  Add amenity=nightclub
  Add smoking field for many presets under amenity, building, office, tourism (for #1990)
Merge pull request #2163 from bhousel/bhousel-presets

Various updates to presets
Fix tag reference layout on FF (fixes #2159)
Add religion to cemetery preset (fixes #2164)
add 35 as an option in the maxspeed dropdown..
add picnic area stuff: firepit, picnic_table, bbq
add preset for leisure=ice_rink
Correctly update UI after choosing GPX file (#2144)
Zoom to GPX after adding (#2144)
Support quartile scheme for any imagery source (fixes #2112)
Direct would-be contributors to people who actually know what they're talking about
Add icon for public_transport=stop_position (fixes #2167)
Incorporate Slide Tool (http://labs.strava.com/slide)