Fix bug where subents of stations might themselves be stations
Fix bug in disallowedDockingCollides (SVN:5698)

This is not the same as 94178d5bbd in master, as that commit uses the new HPvectors.
Update ReadMe file and regenerate PDF
More documentation updates
Fix code to avoid overusing injectors.
Ignore submodules not used on this branch
Merge remote branch 'origin/maintenance/1.77'
Update ReadMe file and regenerate PDF

Cherry-pick of 43a24cf, dcee585