Merge branch 'master' of https://github.com/mr-c/cppreference-doc_debian

debian/source/lintian-overrides: Override license-problem-gfdl-invari…

…ants

Upstream version 20170409

debian/copyright: Update

Upstream version 20151129+dfsg0

debian/copyright: Fix lintian warnings

Upstream version 20140827+dfsg0

debian/copyright: Add missing copyrights

Upstream version 20140208+dfsg1

Imported Upstream version 20140208+dfsg0