revise documentation to make it clearer that KI3 beacons need KIX tech to be useful

[escalonn]

i thought my KI3 core/beacons were bugged, since the informatron said that "KI2 and KI3 core/amplifier can add additional module effects to the KI1 core," just "tune their channel" and "now" modules in the new core will add their effects, and KI2 taught me to expect this to just work. so when i got to KI3 beacons, when iirc it didn't even matter what i put in the KI3 core, KI3 beacons had no use except for larger radius of effect. it never occurred to me that this was working as designed.

reading the KIX tech descriptions - "double the effects of all your KI cores! (only works on KI3 beacon)" - i wrongly believed that, since the KI3 core already seemed bugged & doing nothing, the KIX1 tech would double that nothing and have no actual effect. so i didn't research KIX1 or 2 for a long time! not an ideal user experience.