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).
Short names
Removes unnecessary values and fixes shield drawing.
Merge pull request #228 from TazeTSchnitzel/shortNames

Short names
Merge pull request #229 from lorgan3/generatorResistance

Gives generator shields flat resistance without ramp up, Wareya Sponsored (TM)
Merge branch 'master' into GBGG2
Uses (duplicated) maps instead of ggon strings now.
Adds a proper way to check if a string is a decimal.