Nightvision goggle fix

Lets you actually see in the dark.  Hooray.
Update life.dm
Fixing a too-soon accidental commit.

Restoring that extra line.  Don't know what it does!  Might be important maybe.
Fixing borg nightvision

They have it set to 8 but can't see a thing in the dark.  Not working as intended.
Fixes xeno nightvision

It does.
Fixes xeno nightvision

Yuppers.
Adds in minor powers.

Not touching disabilities yet because some of them don't work.
Fixes XRAY

Kay.
Makes xenos less pitifully unrobust.

Taserhands restored.  Kind of.
Merge pull request #29 from Duck-/master

Nightvision fixes and minor powers