Nhse/d34 orkv.i43 docupdate (#44)

* Update getting started

Updated to include peer discovery and the new worker_count real-time configuration changes.

Provide a better introduction to this guide, to reduce the need to cross-reference other docs.

* Extend concepts section - to explain

* Add max_results tuning section

* Edits and per-bucket full-sync

* Add notes on trigger tree repairs

Make corrections with regards to allcheck window behaviour

* More info on trigger_tree_repairs