bug#25758: Should zathura depend on zathura-pdf-poppler?

[Mekeor Melire <mekeor.melire@gmail.com>]

zathura is a document viewer:

	synopsis: Lightweight keyboard-driven PDF viewer
	description: Zathura is a customizable document viewer.  It provides a minimalistic interface and an interface that mainly focuses on keyboard interaction.

Meanwhile, when you only install zathura itself, it's not usable for any format. You have to install zathura-pdf-poppler in order to be able to open PDF files.

So, shouldn't zathura depend on zathura-pdf-poppler so that PDFs are viewable by default?

On IRC, we agreed that zathura should depend on zathura-pdf-poppler:

	<mekeor> i just installed 'zathura', a PDF viewer. it doesn't work. i get this error first: "could not open plugin directory". can anyone reproduce this?
	<mekeor> oh, i think i have to additionally install another package.
	<mekeor> zathura-pdf-poppler
	<lfam> mekeor: If that's the cause, we should fix it!
	<mekeor> lfam: yes, it was the cause.
	<mekeor> lfam: there are several different backends for zathura. it's imaginable that a person wants to install zathura without PDF support but only postscript support, isn't it?
	<lfam> mekeor: It's imaginable, but we generally intend to provide fully featured packages
	<Sleep_Walker> question is - is there anyone who would like to have zathura and not zathura-pdf-poppler?
	<Sleep_Walker> and I agree that it is unlikely
	<Sleep_Walker> that is moment where weaker dependency like 'recommends' would come handy

If you have a different opinion, let me know. Otherwise, I'm going to send a patch next week which implements this dependency.