changed tspan as default of sequence actor text placement

src/diagrams/sequenceDiagram/sequenceRenderer.js

@@ -34,8 +34,8 @@ var conf = {
     // width of activation box
     activationWidth:10,
 
-    //text placement as: tspan | fo | <else> only text as before 
-    textPlacement: 'fo', 
+    //text placement as: tspan | fo | old only text as before 
+    textPlacement: 'tspan', 
 };
 
 exports.bounds = {

src/diagrams/sequenceDiagram/svgDraw.js

@@ -326,6 +326,6 @@ var _drawTextCandidateFunc = (function() {
 
     return function(conf) {
       return conf.textPlacement==='fo' ? byFo : (
-          conf.textPlacement==='tspan' ? byTspan : byText);
+          conf.textPlacement==='old' ? byText: byTspan);
     };
 })();