adding conversion from Base64 to Integer 64 for OSM ID

[hornig]

gcp-osm/main.py

Lines 65 to 75 in 00cec7f

	if parsed.find("/n/") > -1:
	print("type indicator: n/ = OSM Node ID with Basis 64")
	if parsed.find("/w/") > -1:
	print("type indicator: w/ = OSM Way ID with Basis 64")
	if parsed.find("/a/") > -1:
	print("type indicator: a/ = OSM Area ID with Basis 64")
	if parsed.find("/r/") > -1:
	print("type indicator: r/ = OSM Relation ID with Basis 64")

adding the conversion from Base64 with ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_~ to integer 64bit to convert to OSM id.
More here https://github.com/aerospaceresearch/gcp-osm/blob/master/README.md

[Spnetic-5]

@hornig I would love to work on this issue, is this still active!