Canada fixes

[jtracey]

• first commit moves a Canadian university group from the US directory to Canada's
• second commit renames the OSM-Ottawa-meetup group to add a .json extension, so it gets added to the build
• third commit adds the Canadian OSM mailing list
  edit:
• fourth commit moves the feature file for the Canadian university

[bhousel]

Thanks for this PR and welcome! 👋
I'll merge this after #291 settles.. That will introduce a bunch of breaking changes, but it will let us remove almost all of the geojson files and make contributing easier!