[Ohrrpgce] SVN: teeemcee/12291 Add "get/set global sound volume"

[subversion at HamsterRepublic.com]

teeemcee
2021-07-26 22:00:36 -0700 (Mon, 26 Jul 2021)
57
Add "get/set global sound volume"

Added test to test.rpg
---
U   wip/const.bi
U   wip/docs/plotdict.xml
U   wip/docs/plotdictionary.html
U   wip/plotscr.hsd
U   wip/scriptcommands.bas
U   wip/testgame/test.hss
U   wip/testgame/test.rpg
U   wip/whatsnew.txt