Add MarkdownExtra

[cebe]

Add MarkdownExtra

[samwilson]

I've had a go at implementing footnotes, building on what @panrus had already done: #183.

[kartik-v]

@cebe ... When is this planned?

[cebe]

planned to do 1.0.0 after yii2 beta release which is done now. Will work on this the next weeks so should be available in May. Maybe earlier but can not promise.

[josegonzalez]

Potential code for footnote support

It would be nice if we had leanpub support...

[cebe]

Cool, thanks! Can you open a new issue for Leanpub and link to where it is described?

[kartik-v]

@cebe this is looking good... what is the target closure date for the pending items in this list?

[cebe]

I currently do not have much time to work on this so I do not have a date for it. Feel free to implement things and send pull requests. Hope to get more time for open source work in a month or two.

[Yaco]

Potential code for footnote support

It would be nice if we had leanpub support...

@josegonzalez your link is dead, could you provide an update one? Would be useful to complete footnote support. Thanks!

[panrus]

Potential code for footnote support
It would be nice if we had leanpub support...

@josegonzalez your link is dead, could you provide an update one? Would be useful to complete footnote support. Thanks!

I created new block FooterTrait in MarkdownExtra.
Footnotes implementation

[mizunashi-mana]

@panrus Can you send a PR to this repo?

[josegonzalez]

I no longer have my version, but good to hear that someone else has stepped up :)