Changed enum from [1,7] to [0,6] and in FileToDatabaseMigrator changed WeekDay.getDay(day - 1)

Signed-off-by: Marcin Woźniak <y0rune@aol.com>

buisnesslogic/src/main/java/com/plannaplan/configutils/FileToDatabaseMigrator.java

@@ -77,7 +77,7 @@ public class FileToDatabaseMigrator {
             String sym_str = sym.toString().trim();
 
             int day = (int) Double.parseDouble(day_cell.toString());
-            WeekDay group_day = WeekDay.getDay(day);
+            WeekDay group_day = WeekDay.getDay(day - 1);
             String room = room_cell.toString().trim();
             int time = this.parseTimeToInt(time_cell.toString());