- changed MAX_PERCENT_NOISE_VOLUME_FOR_SILENCED_SOUND from 35 to 50 so that all shots with silencers use the silenced sound instead of the normal weapons sound

- New item tag <SleepModifier>:
This is a percentage bonus to breath regain while resting.
It could be applied to sleeping bags for example.
Reasonable values are from 0 (no bonus) to 100 (twice the regeneration).

git-svn-id: https://ja2svn.dyndns.org/source/ja2/trunk/GameSource/ja2_v1.13@6483 3b4a5df2-a311-0410-b5c6-a8a6f20db521