Fix icon errors

[don-vip]

Following of #30

Please make a release that contain all your icons in a zip archive in order to fix these errors:

ERROR: Failed to locate image 'icons/group_home.png'
ERROR: Failed to locate image 'icons/ambulantorycare.png'
ERROR: Failed to locate image 'icons/social_living.png'
ERROR: Failed to locate image 'icons/sheltered_workshop.png'
ERROR: Failed to locate image 'icons/foodbank.png'
ERROR: Failed to locate image 'icons/outpatient_care.png'
ERROR: Failed to locate image 'icons/social_shelter.png'
ERROR: Failed to locate image 'icons/outreach.png'
ERROR: Failed to locate image 'icons/group_home.png'

ERROR: Failed to locate image 'presets/JusticeScales.png'

ERROR: Failed to locate image 'icons/trade.png'
ERROR: Failed to locate image 'icons/glaziery.png'
ERROR: Failed to locate image 'icons/shoe_repair.png'
ERROR: Failed to locate image 'icons/blacksmith.png'
ERROR: Failed to locate image 'icons/shoemaker.png'
ERROR: Failed to locate image 'icons/buero.png'
ERROR: Failed to locate image 'icons/employment_agency.png'
ERROR: Failed to locate image 'icons/architect.png'
ERROR: Failed to locate image 'icons/government.png'
ERROR: Failed to locate image 'icons/employment_agency.png'
ERROR: Failed to locate image 'icons/government.png'
ERROR: Failed to locate image 'icons/research.png'
ERROR: Failed to locate image 'icons/estate_agent.png'
ERROR: Failed to locate image 'icons/it.png'
ERROR: Failed to locate image 'icons/ngo.png'
ERROR: Failed to locate image 'icons/quango.png'
ERROR: Failed to locate image 'icons/company.png'
ERROR: Failed to locate image 'icons/lawyer.png'
ERROR: Failed to locate image 'icons/travel_agent.png'
ERROR: Failed to locate image 'icons/accountant.png'
ERROR: Failed to locate image 'icons/telecommunication.png'
ERROR: Failed to locate image 'icons/insurance.png'
ERROR: Failed to locate image 'icons/newspaper.png'
ERROR: Failed to locate image 'icons/ambulance_station.png'

[don-vip]

Only valid presets are now accepted in the default list.
I have removed HOT presets and some others until this issue is solved:
https://josm.openstreetmap.de/wiki/PresetsSource?action=diff&version=8