handle response from IO result handler

Update German translation

Update Lua locale files

fix land object placement

use blocking recv in IO thread

Allow vgtBigExplosion in low quality mode Rationale: We already allow vgtExplosion, which is a smaller version. Without vgtBigExplosion, there is not *any* explosion effect.

Move resurrector and seduction distance to uConsts

Don't draw girder/resurrect/seduce circle while hog moves

Homing bee can now be used as secondary ammo

Properly prevent using airstrike or girder in mid-air