Allows any update action to happen, as long as the dependencies are met
Cleans up prepare for documentation tests
Adds documentation example of MERGE with parameters
Allows MERGE to be used inside FOREACH loops
Merge pull request #1237 from systay/merge-with-params

Add documentation for MERGE with parameters
Fix handling null properties in regular expression Cypher clauses
Merge pull request #1236 from systay/foreach-merge

Allows MERGE to run inside FOREACH