src : v1.5.02 round x, y values in cellsByRow layout mode

prevents sub-pixel positioning in WebKit, which causes poor type rendering

jquery.isotope.js

@@ -1,5 +1,5 @@
 /**
- * Isotope v1.5.01
+ * Isotope v1.5.02
  * An exquisite jQuery plugin for magical layouts
  * http://isotope.metafizzy.co
  *
@@ -19,7 +19,7 @@
   // helper function
   var capitalize = function( str ) {
     return str.charAt(0).toUpperCase() + str.slice(1);
-  }
+  };
 
   // ========================= getStyleProperty by kangax ===============================
   // http://perfectionkills.com/feature-testing-css-properties/
@@ -45,7 +45,7 @@
         return prefixed;
       }
     }
-  }
+  };
 
   var transformProp = getStyleProperty('transform'),
       transitionProp = getStyleProperty('transitionProperty');
@@ -1017,8 +1017,8 @@
         var $this = $(this),
             col = props.index % props.cols,
             row = Math.floor( props.index / props.cols ),
-            x = ( col + 0.5 ) * props.columnWidth - $this.outerWidth(true) / 2,
-            y = ( row + 0.5 ) * props.rowHeight - $this.outerHeight(true) / 2;
+            x = ( col + 0.5 ) * props.columnWidth - Math.round( $this.outerWidth(true) / 2 ),
+            y = ( row + 0.5 ) * props.rowHeight - Math.round( $this.outerHeight(true) / 2 );
         instance._pushPosition( $this, x, y );
         props.index ++;
       });
@@ -1203,8 +1203,8 @@
         var $this = $(this),
             col = Math.floor( props.index / props.rows ),
             row = props.index % props.rows,
-            x = ( col + 0.5 )  * props.columnWidth - $this.outerWidth(true) / 2,
-            y = ( row + 0.5 ) * props.rowHeight - $this.outerHeight(true) / 2;
+            x = ( col + 0.5 ) * props.columnWidth - Math.round( $this.outerWidth(true) / 2 ),
+            y = ( row + 0.5 ) * props.rowHeight - Math.round( $this.outerHeight(true) / 2 );
         instance._pushPosition( $this, x, y );
         props.index ++;
       });