[openstreetmap-website] Make map variable global (#538)

[Thomas Pointhuber]

In the js-file the map-variable is currently not global defined.

So, Greasmonkey scripts cannot modify the structure to add pois or so. Defining the variable map and other important variables global would help writing special user scripts.

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/issues/538
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