addition: added bounds models for bounds checking in unit tests.

addition: bounds.init will clear models
addition: added loop model widths id instead of using title as the id
removed parseMessage debug message
addition: added configuration labelBoxWidth and labelBoxHeight for loop label box width/height
change: adjusted svgDraw drawText to support anchor and valign and whether to output a tspan
change: drawText returns an array regardless of array size
change: hardcoded label width/height uses conf.labelBoxWidth and conf.labelBoxHeight
change: Math.round() on many of the calculations to clean up bounds values
change: getTextObj anchor, width, height start as undefined

src/mermaidAPI.js

@@ -335,7 +335,17 @@ const config = {
      * This sets the auto-wrap padding for the diagram (sides only)
      * **Default value 15.
      */
-    wrapPadding: 15
+    wrapPadding: 15,
+    /**
+     * This sets the width of the loop-box (loop, alt, opt, par)
+     * **Default value 50.
+     */
+    labelBoxWidth: 50,
+    /**
+     * This sets the height of the loop-box (loop, alt, opt, par)
+     * **Default value 20.
+     */
+    labelBoxHeight: 20
   },
 
   /**