Added logger for dealing with issue #179

Added markdown files for the documentation.
parseError exposed from the mermaidAPI

src/diagrams/sequenceDiagram/svgDraw.js

@@ -1,6 +1,7 @@
 /**
  * Created by knut on 14-12-20.
  */
+var log = require('../../logger').create();
 exports.drawRect = function(elem , rectData){
     var rectElem = elem.append("rect");
     rectElem.attr("x", rectData.x);