[gtk] Set proc title

Try to set the process title during startup. Before, redshift-gtk appeared as a python process.
This change enables `pgrep redshift-gtk` or `killall redshift-gtk`.
spello: continously => continuously

Signed-off-by: Mattias Andrée <maandree@operamail.com>
Use randr in example of conf file instead of vidmode, randr is superior to vidmode because it supports multple monitors where as vidmode only supports multiple screens

Signed-off-by: Mattias Andrée <maandree@operamail.com>
Merge pull request #48 from maandree/man

Man page improvement and fix typos
Merge pull request #45 from phihag/setproctitle

redshift-gtk: Set proc title using libc prctl
HACKING: Remove PYTHONHOME from example

Should have been PYTHONPATH but since the path is set by the script it is no
longer necessary.
Update fedora spec file for Python3 dependency
Add systemd .service file for redshift

Add a systemd user .service file to allow users to run redshift as a
daemon using systemd. Also adds a new configure option,
`--with-systemduserunitdir`, which gives the install path.

If set to `no`, systemd support is disabled.
If not set, we use `pkg-config` to find the path.
Add systemd user unit file for redshift-gtk
Merge branch 'systemd-service'

Add systemd user unit files for redshift and redshift-gtk.
Fixes #35, fixes #50.
Update bug report URL to github
Makefile.am: Substitute AM_CPPFLAGS for deprecated INCLUDES
Update Fedora spec file with systemd unit install

Install user unit files into %{_userunitdir}.
Update build requirements.
Fix invalid date in changelog.
Merge pull request #42 from maandree/gamma-drm

Support for running Redshift outside X using libdrm
Merge branch 'master' into multimonitor