Add git-games as submodule

lumbric · lumbric · commit ca8127e081ca · 2019-03-30T00:01:45.000+01:00
diff --git a/session1_git_and_workflow/git-games b/session1_git_and_workflow/git-games
@@ -0,0 +1 @@
+Subproject commit d40bb6f6024512fb12d864b11a9e7dbf4454c985

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