Adding tanks from various mods.

Mods include SXT, Aerojet Kerbodyne (blackheart612), kommit’s
octostruts, and NFT Construction. Also added some missing tanks from
KSPI and Nazari’s Mk3 mod.
Cleaned out unneeded comments.
Adapted the B9 tanks for the new v5. Should be backwards compatible for now. Old parts now marked with the //Legacy comment.
More B9 v5 changes
Merge pull request #26 from Raptor831/master

Adding tank configs for various mods