Minor fixes/improvements for existing features (by Sevenfm)
- Removed some unnecessary options for SHOW_HEALTHBARSOVERHEAD, SHOW_COVER_INDICATOR.
- New option: ENEMY_CLOCK_SPEED_PERCENT - set clock speed during enemy turns.
With this option, player can set default speed to comfortable value (100-120) and set increased speed for enemy turns (150-200).
git-svn-id: https://ja2svn.mooo.com/source/ja2_v1.13_data@1997 4f8fa57e-7814-0410-bad4-adc449f26b7c