Fix broken link to Neo4j.rb.
Respect the projected direction in variable length expansions.

For patterns of the type a-[r:rel*]->(b) we should always return the the found
relationships in the order going from a to b even though the actual expansion
was done from b to a.
Merge pull request #3569 from nawroth/2.0-neo4jrb-link

Fix broken link to Neo4j.rb.
Merge pull request #3584 from pontusmelke/varlength-projected-direction

Respect the projected direction in variable length expansions.
Merge remote-tracking branch 'upstream/2.0-maint' into 2.1-maint