Feedback and Feature Request

1. In Route 66 - plugin setting page, there is no hint to use the brackets {}, so at first, I tried to use one of the given examples, like itemAlias but when I click save, an error message was shown:
Warning
Invalid pattern provided for "Item URL pattern"
I went then to the documentation page to realize that I should use {}.
So I suggest adding a hint to the end user to use brackets.

2. It would be great if you add Canonical URL support for content and K2. Currently, I'm using a free extension (Aimy Canonical http://extensions.joomla.org/extension/aimy-canonical) which is great, but still, I prefer your extension to have this functionality :)

"You should see the canonical tag added when the page is accessed by a URL which is different than the canonical"

I don't see the canonical tag in the page source, I can see that when the page is accessed by mydomain.com/blog/item/6-article-item-title URL it will redirect to mydomain.com/article-item-title but there is no canonical tag in the page source.

I'm using {itemAlias} Item URL pattern, latest Joomla 3.5.1, K2 2.7 and Protostar template.