Found more cases when a hash join can be terminated early
Import tool docs and packaging.

* Add docs.
* Include it to be deployed with mvn artifacts.
* Include it in download packages.
* Fix script to look for the correct class.
* Upgrade doctools to get bugfix for code listings in manpages.
Fixed NPE in bootstrapper when properties file not specified
Merge pull request #3451 from nawroth/import

Import tool docs and packaging.
Merge pull request #3450 from lutovich/2.2-npe-in-bootstrapper

NPE in Bootstrapper#start when neo4j.properties not specified
Merge pull request #3449 from systay/smarter-hash-joins

Found more cases when a hash join can be terminated early