Lobre/lines format

[lobre]

Hello @juruen,

I have started a refactoring with this pull request by creating 2 separate packages for 2 well defined purposes:

• archive: for interacting with a remarkable ".zip" file more easily.
• encoding/rm: for marshaling/unmarshaling a ".rm" file.

This would help building a solid base around remarkable formats before starting to analyse the new SVG feature (#41).

The package archive is more or less a wrapper around the standard "archive/zip" package and the interface is similar.

I have added the package "rm" into an "encoding" folder as made in the standard library for different formats (e.g. encoding/json). That would allow for instance to create other encoders/decoders for other remarkable files present in the ".zip" (e.g. encoding/pagedata). The code of this package is by the way a lot inspired by what you did in "annotations/rm.go". I have added the "encoding/rm/marshal.go:MarshalBinary" method as TODO so far because did not take the time to implement it.

I have refactored your annotations package to use these 2 new introduced packages. But I did not take time to refactor the "api" package but this would be nice to use them as well. As far as I understand, the "util/zipdoc.go" could disappear if everything is refactored.

I let you have a look and come back to me if you see any problems with this implementation!
Thanks,
Loric

[juruen]

Hey @lobre,

This looks great! Planning to take a look and merge it this weekend!

[juruen]

Really nice job! Looks super clean and lays the foundations to iterate over it! 👏 👏 👏

I just added one comment but am approving the PR already!

Great work!