update lib documentation

others/guide/how to write JDito code.adoc

@@ -143,6 +143,7 @@ So just start your functions / methods name with a _ if you need private methods
 
 --> do not use functions which start with a _ outside of the class!
 
+Add @ignore to the Comment of the function.
 
 == JS-Doc ==
 

others/guide/instanceableLibExample.adoc

@@ -43,6 +43,7 @@ UtilClass.prototype.myFunction = function(param1, param2) {
  * @param {String} param3 is for ...
  * 
  * @return {String} a result
+ * @ignore
  */
 UtilClass.prototype._myPrivateFunction = function(param1, param2, param3) {
     if(param1 && param2 && param3) {

others/guide/staticLibExample.adoc

@@ -39,6 +39,7 @@ ExampleUtils.staticFunction1 = function(param1, param2) {
  * @param {String} param3 is for ...
  * 
  * @return {String} a result
+ * @ignore
  */
 ExampleUtils._privateStaticFunction1 = function(param1, param2, param3) {
     if(param1 && param2) {