Update readme with examples

[ali-thowfeek]

I'm fairly new into flutter like so many others these days ;)

Now I cant see a way of how to use this in my flutter project. The package doesn't seem to have any Widgets which i could use in the first place.

Please help me out.

[sohelyadav]

please upload example. thanks

[eGust]

Hi guys,
Hopefully I will find some time next month to continue another project epub-shuffle which uses this package. Since the APIs are not stable yet, and probably still buggy, I don't think it's the right time to write document.

btw, this package is only for reading and parsing EPUB file format. Since EPUB contexts are pure HTML + CSS, I don't have any plan to make any UI compoent. I suppose something like WebView would be a simple approach for UI, just like what I did in epub-shuffle.