Templaters comparison

[katel0k]

This issue aims to complete this templater comparison. Progress can be tracked in this repository. This issue will be updated accrodingly

For now, I have compared how those libraries can be covered using bisect_ppx. All libraries have successfully been covered, but with differing results.

	eml	mlx	TyXML	TyXML let%html	dream-html
syntax preservation	no, transforms into internal representation	no, transforms into ocaml	yes	yes	yes
readability	no, internal representation is compressed	yes. Resulting ocaml is readable	yes	yes	yes
comments				only ocaml parts are covered

[aantron]

Great, thank you! Could you add little representative screenshots of what the HTML coverage report looks like for each of the templaters?