Pull useful icons from scottdejonge/map-icons

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There is another great map icon library, scottdejonge/map-icons, which is no longer maintained

Because many of those icons would be very useful for the iD editor, last year I asked permission to mirror them into this repository, and the author kindly accepted. Thanks Scott! 🙇

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I've added 80 icons:

abseiling.svg
accounting.svg
amusement_park.svg
archery.svg
atm.svg
beauty_salon.svg
blind.svg
boat_ramp.svg
boat_tour.svg
boating.svg
book_store.svg
bowling_alt1.svg
canoe.svg
car_dealer.svg
car_wash.svg
casino.svg
chairlift.svg
climbing.svg
compass.svg
courthouse.svg
cross_country_skiing.svg
diving.svg
electronic.svg
fish_cleaning.svg
fishing_pier.svg
florist.svg
food.svg
furniture.svg
gym.svg
hair_care.svg
hang_gliding.svg
ice_fishing.svg
ice_skating.svg
inline_skating.svg
jet_skiing.svg
jewelry_store.svg
kayaking.svg
laundry.svg
lawyer.svg
library.svg
lock.svg
movie_rental.svg
museum.svg
pet_store.svg
pharmacy.svg
physiotherapist.svg
pin.svg
plumber.svg
post_box.svg
rafting.svg
real_estate_agency.svg
rv_park.svg
sailing.svg
school.svg
scuba_diving.svg
shopping_mall.svg
skateboarding.svg
ski_jumping.svg
skiing.svg
sledding.svg
snow.svg
snow_shoeing.svg
snowboarding.svg
snowmobile.svg
spa.svg
storage.svg
surfing.svg
taxi_stand.svg
telephone.svg
tennis.svg
toolbox.svg
transit.svg
travel_agency.svg
truck.svg
veterinary_care.svg
waterskiing.svg
whale_watching.svg
wheelchair.svg
wind_surfing.svg
zoo.svg