Shortcut keys

[btzr-io]

Add shortcut keys to control the viewer like f to toggle fullscreen.

[btzr-io]

I think needs a simple system to register them, unless openseadragon provides something for this,.

[Nargonath]

I'll have a swing at it

[btzr-io]

Awesome, thanks. Let me know if you have any questions.

[Nargonath]

Alright, thanks.

[btzr-io]

@Nargonath are you still working on this ?

[Nargonath]

Yes I am. I just had some other stuff to take care in other open source projects I maintain. 😃 I wrote some code, now I just need to test it. I should be able to do it during the weekend.

[btzr-io]

@Nargonath Oh lol, dont worry just checking

[Nargonath]

No worries. I might ask you some questions about testing using the examples if I cannot figure it out myself.

[Nargonath]

Isn't this issue closed by the PR mentioned above?

[btzr-io]

@Nargonath No, needs improvements and more shortcut keys

[Nargonath]

I see. I deleted the work I did because it was covered by the above MR.

[btzr-io]

Openseadragon Shortcut keys:
https://github.com/openseadragon/openseadragon/blob/92904b7ac9f46583a3ba9237446c0608a0eb2ca0/src/viewer.js#L2583