Add ability to export in other formats such as JSON and Markdown

[kriskenyon]

OK this is a bigger ask but I recently came across toast-ui another editor and they offer a Markdown mode that looks very interesting. I can see a lot of use cases for this but also a fair number of problems (i.e. how do you save markdown or html?)

Really I am hoping others will comment on this and give input.

[anthonyjb]

@kriskenyon actually this is something that I originally flagged a feature for CT version 1 along with JSON support. I've looked at several other frameworks that provide. With both options you will have some cases where you need to store a string with embedded HTML I believe, but actually this isn't a problem in most cases (this is supported by Markdown and JSON wont care).

So you might get output along these lines:

{
    "region_name": "content",
    "elements": [
        {
           "tag": "p",
            "html": "The Goonies Quotes",
            "class": "intro"
        },
        {
           "tag": "ul",
            "elements": [
                {
                   "tag": "li",
                   "html": "Hey... <b>you... guys!!!</b>"
                },
                {
                   "tag": "li",
                   "html": "Goonies <i class=\"bounce\">Never</i> Say Die"
                }
            ]
        }
    ]
}

The Goonies Quotes

- Hey **you... guys!!!**
- Goonies <i class="bounce">Never</i> say die

The ability to easily extend the API to export the tree in different formats is a core feature I want to support, I'm going to modify the title of the issue inline with this and put the feature on the road map.