Artifacts fixes part 3

+Fixed the artifact of the fool, it will now work and reduce/increase
troops speed
+Optimized some templates file and deleted some useless files
+Added a method to Database.php which permits to calculate things
related to artifacts (it's not general yet, it only works for troops
speed)
-Removed artifact of the fool "Account" type, because it shouldn't exist

Templates/Build/27_show.tpl

@@ -53,7 +53,7 @@ switch($kind){
         break;
 }
 
-$bonus = $betterorbadder." ".$effecty;
+$bonus = $betterorbadder." (<b>".str_replace(["(", ")"], "" , $effecty)."</b>)";
 ?>
 
 <div class="artefact image-<?php echo str_replace(['type', '.gif'], '', $artefact['img']); ?>">