gnu: Add python-nautilus.

* gnu/packages/python.scm (python-nautilus): New variable.

gnu: Add python-bcrypt.

* gnu/packages/password-utils.scm (python-bcrypt): New variable.

gnu: Add python-nose2.

* gnu/packages/python.scm (python-nose2): New variable.

gnu: Add python-cov-core.

* gnu/packages/python.scm (python-cov-core): New variable.

gnu: Add python-consul.

* gnu/packages/python.scm (python-consul): New variable.

gnu: Add python-graphene.

* gnu/packages/python.scm (python-graphene): New variable.

gnu: Add python-django-filter.

* gnu/packages/django.scm (python-django-filter): New variable.

gnu: Add python-pytest-django.

* gnu/packages/django.scm (python-pytest-django): New variable.

gnu: Add python-sqlalchemy-utils.

* gnu/packages/python.scm (python-sqlalchemy-utils): New variable.

gnu: Add python-graphql-relay.

* gnu/packages/python.scm (python-graphql-relay): New variable.

gnu: Add python-graphql-core.

* gnu/packages/python.scm (python-graphql-core): New variable.

gnu: Add python-pytest-mock.

* gnu/packages/python.scm (python-pytest-mock): New variable.

gnu: Add python-promise.

* gnu/packages/python.scm (python-promise): New variable.

gnu: Add python-peewee.

* gnu/packages/databases.scm (python-peewee): New variable.

gnu: Add python-pika.

* gnu/packages/python.scm (python-pika): New variable.

gnu: xorriso: Update to 1.4.6.

* gnu/packages/cdrom.scm (xorriso): Update to 1.4.6.

gnu: autoconf-archive: Update to 2016.09.16.

* gnu/packages/autotools.scm (autoconf-archive): Update to 2016.09.16.

gnu: gtk+ use modify-phases

* gnu/packages/gtk.scm (arguments): Replace alist-cons-before with modify-phases

gnu: Add sendmail

* gnu/packages/mail.scm (sendmail): New variable.

gnu: Add python-glances.

* gnu/packages/python.scm (python-glances, python2-glances): New variables.

Signed-off-by: Leo Famulari <leo@famulari.name>