[Ohrrpgce] SVN: james/10167 Add prefix string argument to savegame() loadgame() and save_slot_used()

[subversion at HamsterRepublic.com]

james
2018-03-21 13:40:37 -0700 (Wed, 21 Mar 2018)
198
Add prefix string argument to savegame() loadgame() and save_slot_used()
in preparation for storing quicksave differently than the normal save slots
Also added maxSaveSlotCount currently set at 1000
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U   wip/const.bi
U   wip/savegame.bi
U   wip/savegame.rbas