Added 'catchall' in the model.

Added 'catchall' parameter for the macro so that it can be documented.
Updated doco about @ tags.

README.md

@@ -55,6 +55,8 @@ Example:
 <#/macro>
 ```
 
+You can use any `@` tags you want such as `@author`, or `@mytag`. These tags will be parsed and available in the template on the `macro` or `comment` objects (i.e. `macro.@author` ...).
+
 ### Global comment
 
 A global comment for a given `.ftl` file can be written at the top of the file. The first comment found that isn't followed by a `<#macro />` is considered the global comment.

src/main/java/freemarker/tools/ftldoc/FtlDoc.java

@@ -590,6 +590,7 @@ private Map createCommentedMacro(Macro macro, Comment comment, File file) {
  result.put("isfunction", new Boolean(macro.isFunction()));
  result.put("type",macro.isFunction()?"function":"macro");
  result.put("arguments",macro.getArgumentNames());
+ result.put("catchall", macro.getCatchAll());
  result.put("node",new TemplateElementModel(macro));
  result.put("filename", file.getName());
  return result;