Support mobile

[keicoon]

Add Some feature for mobile

• Add mobile.index, npm server.js , mobile-css file
• Virtual Pad ( TODO: use canvas, not button dom )
• Fix bug in util Serializer
• Using https ( for Accessing save and load file )

Thanks :)

[keicoon]

Test is success in safari for ios , chrome for ios :)

[andychase]

Sorry for the delay in reviewing this.

First of all huge thanks in doing this work, I'm extremely grateful for the time spent here.

I'm going to merge this to a new branch called "mobile"

Some feedback:

• What do you think about trying to reconcile the desktop and mobile versions of the application? I personally believe in progressive enhancement so having one page that supports both mobile and desktop.
• What's the advantage of adding an express server? Trying to keep things simple but if there's a good reason to include it then I understand

[andychase]

I merged your PR into the mobile branch

[chunibyo-wly]

Hello, thanks for your work. if have I want to play this version, should I deploy by myself?

[andychase]

@chunibyo-wly yes right now I haven’t merged this onto the website, mostly because I would have to the express dependency for it to work with GitHub pages