Updated broken git submodule links

I'm new to this repo but am assuming that these links should have been pointing to their git repositories.  Previously they were broken, I'm assuming you recently refactored some of this.
Merge branch 'patch-1' of https://github.com/OAGr/snowplow into OAGr-patch-1

Conflicts:
	1-trackers/README.md
Merge branch 'OAGr-patch-1' into feature/0.9.7-new