Add instructions

[jidanni]

Add instructions:
"To use this website, click Get RSS Link."

[jidanni]

There is more to it, not revealed on
https://simon04.dev.openstreetmap.org/whodidit/wdi_guide.gif

[jidanni]

1. User visits https://simon04.dev.openstreetmap.org/
2. User zooms in to place he is interested in, till he can zoom no further.
3. User sets Age to Eternity.
4. User does not know now what to do. There is no "submit button".
5. User tries clicking some things. He is in luck when clicking the RSS button, he draws a bounding box and views the RSS output. And says to himself "OK, I guess this is it."
6. But user also notices links in the RSS output, and tries one, https://simon04.dev.openstreetmap.org/whodidit/?lat=24.18&lon=120.86&zoom=12 holy smokes, that is much better! It has the colored squares.
7. OK finally in the corner we find "Permalink", https://simon04.dev.openstreetmap.org/whodidit/?lat=24.18942&lon=120.86423&zoom=18&layers=BTT&age=1000 but as you see there are no rectangles even though we selected Eternity.

On
https://simon04.dev.openstreetmap.org/whodidit/wdi_guide.gif
it says if there are no rectangles, one should "zoom in to level 12". Maybe it means "zoom out to level 12."

Also "decrease age" isn't clear. Maybe you mean "increase age range to a longer time span". Maybe you mean "decrease age range to a shorter time span."

Conclusion: site barely usable due to lack of instructions. Sorry.