implemented show method for gyms
return 404 when gym does not exist when accessing its routes
added number for route
tried to configure connection pool
checking whether parent resource is named 'gyms'
joining location to route table when fetching

should dramatically improve performance
removed photo

not used right now and I do not want to load it from the DB every time
updated floor plan of heavens gate
added data folder from bouldering competition and current HG boulders
added number to route
added date for when a route was set
return number, not name for 'number' JSON field
updated HG floor plan (higher resolution version)
v3 of HG floorplan