Gives generator shields flat resistance without ramp up,  Wareya Sponsored (TM)
Also fixes (in comments) the old shieldresistance value since that's broken (shield gets stronger when it's near dead).
Removes unnecessary values and fixes shield drawing.
Merge pull request #229 from lorgan3/generatorResistance

Gives generator shields flat resistance without ramp up, Wareya Sponsored (TM)