Symlink to new manifest location

Clients that aren't yet updated will still rely on this location after
the move, and will fail unexpectedly. Symlink allows existing clients to
function as otherwise expected until they finally update.

sherlock/resources/data.json

@@ -0,0 +1 @@
+sherlock_project/resources/data.json

sherlock/resources/data.schema.json

@@ -0,0 +1 @@
+sherlock_project/resources/data.schema.json