Fade out technologies that a faction needs more pre-reqs for

[SephHawkins]

Cases to handle:

• [x] Nekro Virus - Can research everything that other players have
• [x] Jol-Nar - Ignores 1 pre-req for non unit-upgrade techs, hero has no restrictions on gained tech
• [x] Tech Skips - Count as a pre-req for that color
• [x] Yin Brotherhood (PoK) - Commander counts as a green skip
• [x] Yin Brotherhood (Omega) - Allows ignoring pre-reqs for techs that other players have
• [x] L1 Faction Tech - Allows ignoring pre-reqs for any tech
• [x] AIDA - Ignores 1 pre-req for unit-upgrade techs