Create and enhance the layout of the exported versions

[1cadumagalhaes]

The current layout does not work well when we try to print it.

Image

I think we could do some enhancements, like;

1. When exporting the cv, break it into pages considering a default page size (A4, probably), instead of saving the image into the pdf format directly.
2. Maybe give the user the possibility to choose the layout the resume will be exported. I've seen this on resume.io, and though it may not be that simple, would make cvkeep my main (and only, to be honest) resume.

templates

[1cadumagalhaes]

I know I could make both of this using the exported json, so I'll work on it as a proof of concept.