- modified and improved various env. drivers

- implemented string array object

ease.h

@@ -82,6 +82,7 @@ int EaseHandler(EaseBase *eab);
 void EaseBasePar(void *object);
 void EaseSendPar(void *object);
 void EaseMsgPar(void *object);
+void EaseKillDriv(EaseDriv *ead);
 void EaseDrivPar(void *object, char *fmt, char *unit);
 void EaseParHasChanged(void);
 void EaseStop(EaseBase *eab);