Allow config() and start() to be called from within a typset() callback. Issue #323.

Author: dpvc

lib/main.js

@@ -773,9 +773,9 @@ function ReturnResult(result) {
     state.n = GLYPH.n;
     state.ID = ID;
   }
-  callback(result, data);
   serverState = STATE.READY;
-  StartQueue();
+  callback(result, data);
+  if (serverState === STATE.READY) StartQueue();
 }
 
 //
@@ -809,8 +809,8 @@ function RestartMathJax() {
     MathJax.Hub.queue.queue = [];  // clear MathJax queue, so pending operations won't fire
     MathJax = timer = window = document = html = content = null;
     ReportError("Timeout waiting for MathJax:  restarting");
-    serverState = STATE.STOPPED;
   }
+  serverState = STATE.STOPPED;
   GetWindow();
   ConfigureMathJax();
   StartMathJax();