Add Far-Sighted trait

Added the Far-Sighted trait, mitigated by reading glasses (much like Near-Sighted is mitigated by eyeglasses). Now reading glasses actually serve a purpose, yay!

When not wearing reading glasses, a character with Far-Sighted cannot read or use computers (can't even read a Playboy, unlike illiterate characters); takes a penalty to melee accuracy; and has lower success on crafting (but not disassembling) electronics and tailoring recipes. Crafting penalty added after GlyphGryph suggested it.

The accuracy penalty is equivalent to lowering melee skill by 2 points, or Dex by 4 points. The crafting penalty is equivalent to 2 ranks of electronics and 1 rank of tailoring (soldering seems more delicate than sewing).

Thoughts on balance: the melee penalty seems like the major part of this trait, since that's the context where your glasses will get broken. I made it a 2 point trait, and that could be used to buy 2 points of Dex (equivalent to 1 point of melee accuracy). Since the melee penalty is situational and only affects part of what Dex does, I want the penalty to be higher than what 2 points of Dex gives you. Hence, 2 points of melee accuracy, to ensure that it's not freebie points.