describe used tags

[matkoniecz]

Ideally, declare that in one place and use that to specify fill, merging and so on,

And generate description in taginfo file.

And generate description of used tags on https://matkoniecz.github.io/lunar_assembler/examples/laser_neighbourhood.html and https://matkoniecz.github.io/lunar_assembler/examples/laser_road_crossing_closeup.html

for taginfo: laser_neighbourhood_taginfo.json - https://wiki.openstreetmap.org/wiki/Taginfo/Projects#Project_Files

{
    "syntax_documentation": "https://wiki.openstreetmap.org/wiki/Taginfo/Projects#Project_Files",
    "data_format": 1,
    "data_url": "https://raw.githubusercontent.com/matkoniecz/lunar_assembler/master/examples/laser_neighbourhood_taginfo.json",
    "project": {
        "name": "neighbourhood laser map style for Lunar Assembler",
        "description": "Map style used to generate maps - designs for use in a laser cutter to produce tactile maps for blind",
        "project_url": "https://github.com/matkoniecz/lunar_assembler",
        "doc_url": "https://matkoniecz.github.io/lunar_assembler/examples/laser_neighbourhood.html",
        "contact_name": "Mateusz Konieczny",
        "contact_email": "matkoniecz@tutanota.com"
    },
    "tags": ["list of keys and tags used (see below)"]
}

[matkoniecz]

Partially done, partially replaced by #90 #91