Release damn (javascript) client version 0.26.0

The main improvement is switching to custom imagery when specified
within the area instructions.

Jiri Vlasak (10):
      Rephrase damn project summary based on weeklyOSM
      Reset more div whenever route
      Use dictionary for intersecting
      Skip duplicated intersecting
      Consider GeometryCollection as GeoJSON Feature
      Merge branch 'improve-intersecting'
      Remove link to rapid2 beta, it is released now
      Fix HEAD^
      Show auth link on panel when not authed
      Add imagery layer from area instructions