Update documentation.
Add missing line for final cycle point.
Initialise process pool early

Move "process pool size" setting from suite to site/user.

Reduce memory footprint at point of fork to reduce memory footprint at
the start of each child process.
Merge pull request #1103 from matthewrmshin/init-process-pool-early

Initialise process pool early
Merge pull request #1101 from arjclark/doc.add_chaining_mention

Documentation: discuss chaining offsets in cycle point offset
Added the "definition order" sort algorithm test to the dev dir.