improved enemy normal scarabs behavior. Removed waits and saved cpu cycles as per issue #37
Failed to improve Area completed screen by testing with Enemy bullet turret boss for dramatic ending. Need to revisit this again. Issue #39
New global variables sheet included onto stages.
Bosses made deadly when reached end of stage, by dynamic increase of damage points
moved petty animations and tank direction pointer to housekeeping sheet
Enemy_BOSS_scarab sheet cleaned acc to #37. To continue later