Direct access to HTTP request within .get() method

In order to create some queries like "GET /issues/296.xml?include=journals" I added an extra keyword arg to Redmine_Items_Manager.get() method in that's directly passed to the lower .get() method.

That way I can query "journals" or any other attribute of a particular issue.
If there was another way to accomplish this I wasn't able to figure it out :-)

Thanks again for your work, your module is really great to work with !

R.