dev-python/pyzor: new revision to fix some open bugs.

dev-python/pyzor: new revision to fix some open bugs.

Lots of changes all at once:

* Update to EAPI=6.
* Remove an old pkg_postinst() notice about a relocated executable.
* Add IUSE=gdbm to make the gdbm daemon backend optional.
* Only require a (gdbm, mysql, redis) backend with USE=pyzord.
* Add a patch submitted upstream (by me) to fix a unicode crash.
* Require sphinx with USE=doc (bug 636752).
* Remove version constraints on redis-py and gevent (bug 643692).
* Use HOMEPAGE to make SRC_URI fit on one line.
* Add die() to "mv" and "rm" commands in src_install.
* Removed seemingly-unnecessary DISTUTILS_IN_SOURCE_BUILD=1.
* Added myself to metadata.xml as a maintainer.
* Improved the back-end database engine USE flag descriptions.

Bug: https://bugs.gentoo.org/636752
Bug: https://bugs.gentoo.org/643692
Package-Manager: Portage-2.3.19, Repoman-2.3.6