Smarty template engine has a very convenient [{debug}](http://www.smarty.net/docs/en/language.function.debug.tpl) built-in that gives a quick overview of variables available for designer.  It would be nice to have the same stuff in Jinja2 [by default](http://stackoverflow.com/questions/3398850/how-to-get-a-list-of-current-variables-from-jinja-2-template)
Smarty template engine has a very convenient {debug} built-in that gives a quick overview of variables available for designer.
It would be nice to have the same stuff in Jinja2 by default