Improve Twitter Cards Support

Hello

It's been a while that JFBConnect generates Twitter Cards (as it does for Facebook Open Graph), but I never really had a look at it. Now that I have, I see only one thing missing considering my needs.

JFBConnect can only generate "Summary Cards", not "Summary Cards with Large Image". Difference is very minor in card tags, but rendering in Twitter is really different.
I would suggest that you add in JFBConnect Open Graph Objects a new parameter:
Twitter Card: Disable / Summary Card / Summary Card with Large Image

Doing that would really improve you Twitter Cards support, and I would even suggest that you rename your "Open Graph" section in JFBConnect configuration to "Social Meta" and change wording in the section to make clear that it's not only about Open Graph, but also about Twitter Cards.

It does not look like a big work, a bit of code and some documentation, but it would make more obvious (and true ) that you support Twitter Cards.

Oh sorry, I missed these options that were introduced recently (JFBConnect 7.0.1) and I could not find when going through your documentation

So what is missing, as compared to my suggestion, is the ability to define the Twitter Card options per Open Graph Object. For some pages maybe the "Summary Card" is suitable, for other pages "Summary Card with Large image" is best, and for some other pages disabling Twitter Cards makes sense (e.g. because they are handled by the component itself).

But at least I have an option for a site wide choice now

And yes, one more thing

In Twitter Card options, it is unclear whether you should put the @ for Website and Creator Usernames. The fact is that you should not, otherwise you get in the page:
<meta name="twitter:site" content="@@altitudes"/>

And note that if you don't define anything for Creator, you get in the page:
<meta name="twitter:creator" content="@"/>

Not very clean This is not clear whether this tag is required or not (see Invalid consumer key/secret in configuration).