Documentation improvements all around.
Revert "Documentation improvements all around."
Breaks server tests.

This reverts commit 58d9152ae004397379c44403d1339ea145e438c5.
Fix upload paths for docs

For browser and two other modules that were missed
Adding note about testing plugins/ extensions
Fixes message reordering issue in Atomic Broadcast

Messages that created new messages caused a message reordering
 issue that can really screw things up. This deals with that by
 replacing the single queue with two stacks that are cleverly
 bounced back and forth to get the correct ordering.
Adds a test for this condition

Authored by Rickard Oberg
Neo4j Desktop plugins directory README now refers to the manual for documentation