Location algo to check if spot near other location.
Start to implement spots and related voting and comments.
voting improved. Users can no longer vote multiple times on the same spot.
Spot comments and votes functionality improved
Merge branch 'api'

# By StefChri
# Via StefChri
* api:
  Spot comments and votes functionality improved
  voting improved. Users can no longer vote multiple times on the same spot.
  Location algo to check if spot near other location. Start to implement spots and related voting and comments.