bbbike-snapshot.cgi: again enable snapshots from local directory

If local=1 is set, then a snapshot from the local directory is done,
like it was before introducing the default github archive link.

The code flow is somewhat inefficient (Botchecker_BBBike) being called
twice, but the local=1 URL is not announced anyway.

To avoid redefinition warnings, the "do" for Botchecker_BBBike was
replaced with a "require."
data update (bugfix: Radspur in der Mollstr.)
bbbikegooglemap-selenium: reminder for starting selenium is now a diag()
fix bbbikegooglemap-selenium.t issues

Adapt the map click simulation to use Gmap v3 objects.
get_eval does not work anymore, replaced with run_script calls.
Both is now in the new function simulate_map_click().

Mention higher Selenium version in diagnostics (the 2.33.0 does not
work with recent Firefox).

Add a simple map element test.