Develop url search

See merge request !5

# Conflicts:
#   data_handler.py
#   tabs/forecast_callbacks.py

Fix issue with was and prob maps not loading when navigated to with URL. Also, create was.json dev/prod settings

Rework create_spain_loop to accept a country as a variable and zoom on the coordinates noted in json file

Restyle today/tommorow slider

See merge request !4