Feat: Already uploaded images(for edit purposes)

[sabrio]

Feature requested in #12 for edit purposes, also I added demo on the first page.
Please review this PR and let me know what do you think. I/We need this feature immediately in.
Thank you.

[UncleDave]

Looks good - thanks for this PR and the demo, could you please also update the readme accordingly?

[sabrio]

NP @UncleDave, yes ofc I can update it.

[aberezkin]

Nice! Can you please add some spaces if(..) -> if (...) to match our code style?

[aberezkin]

){ => ) { also :)

[aberezkin]

Also, I'm glad that you chose our lib for your first GitHub contribution :)

[UncleDave]

On the subject of code style, as raised by @aberezkin, there is an .editorconfig file in the repo - WebStorm supports this natively, and Visual Studio Code has a plugin for this although I'm not sure Visual Studio Code will match all of our styles correctly. If you're not using WebStorm I don't mind giving it a run through the autoformat after we merge this.

[sabrio]

@aberezkin thank you for your review&code style correction and I am also glad to help to improve this library because I found it really useful and simple. This is what Autoformat did to the component 2a82743. I will revert it if needed. Let me know what do you think?

[UncleDave]

Fine by me.

[sabrio]

@UncleDave when this feature is going to be available for use in the package? Are you planning for pre-release so can use the development features and test them? smth like: 1.0.0-alpha.1

[UncleDave]

I have made that suggestion in #102, but I'm not the one who controls npm releases.