Add dependency to lsof for Debian packages.

This fixes #596.
added support for referencing distinct return expressions in order by
Fixes #578
Adds docs for ha.slave_only.
added detection for full vs incremental backup/ deprecated -full and -incremental flags from backup tool
Merge pull request #627 from lassewesth/tweakstobackup

added detection for full vs incremental backup and deprecated mode flags
Put an entry to control concurrency into the docs.
Merge pull request #626 from jexp/diagnostics-free-disk-space-percentage

fixed free disk space percentage reporting
Handles single node patterns in MATCH
Merge pull request #637 from systay/single-node-patterns

Handles single node patterns in MATCH
Changes DechunkingChannelBuffer to use milliseconds since that's the configuration provided value
Make the Cypher reference a top level part of the manual.
Docs formatting typo.
Added the failsafe plugin as needed.
Merge pull request #644 from nawroth/cypher-part

Make the Cypher reference a top level part of the manual.
Merge pull request #642 from digitalstain/netty-buffer-timeout

Changes DechunkingChannelBuffer to use milliseconds since that's the configuration provided value
TraversalMatcherBuilder handles global queries
Merge pull request #598 from jotomo/596

Add dependency to lsof for Debian packages.
Updated broken neo4j version injection in webadmin.
Temporarily ignored webadmin integration tests