Implement support for RM1

[owulveryck]

As discussed in #19 it should be straightforward to implement a support for RM1.

I will not do it as I do not have a RM1 for testing, but I will eventually provide some help if someone wants to do it.

[dedsm]

Hey I have a RM1 and I can be of help

[owulveryck]

Hello,
With the recent change, I guess that you would need to change only the internal/remarkable package.
This function should open /dev/fb0 and returns the pointer to the file and a 0

You also need to change the const.go file and tweak the index.html (to change the resolution here as well).

I don't know the image format of the RM1, but I guess that you should also bypass the rle encoding, meaning replacing this by a simple w.Write(imageData) and change the javascript file (which is a bit less trivial)

[digisus]

@dedsm any news here? I am wondering, were you successful in porting it to your RM1?

[dedsm]

Hi! no sorry I went the lazy route and started using the remarkable desktop app with wine