VM package release 2021.04.19 multiple

By multiple requests, this is a re-upload of my VesselM-based package of related addons:

• Historical Spaceports
• R-9
• First in Space
• Vostok, Soyuz
• Proton
• Collectors Addition

Includes versions for both Orbiter 2010 and 2016 (due to some unavoidable breaking changes in 2016, older 2010 version is still relevant for some visual effects and for people who need these visuals).
Order of installation: Speceports first, Collectors last, others are in between and should not matter.