Bug#762933: debsources: webapp should not require python-matplotlib

[Stefano Zacchiroli <zack@debian.org>]

Package: qa.debian.org
Severity: normal
User: qa.debian.org@packages.debian.org
Usertags: debsources

Since the refactoring with the top-level debsources/ module, the webapp
requires python-matplotlib to be installed to run properly. That is
unfortunate, as matplotlib is needed only by the updater, and induces weird
requirements on the webserver user (e.g., a writable /var/www/.matplotlib ?!!).

We should track down and remove this dependency.

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.14-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash