README: update.
lpf-gui: refactor menu search.
lpf-gui: refactor show_log.
pylint: restore local branch default.
notify: Use sane DISPLAY when defined as e. g.,  :0.
update: Skip confirm dialog for single pkg update.
notify: style: use 'local', quote case labels.
manpage: update.
scripts: Add vim modelines.
Use pkexec instead of sudo to add pkg-build group (#19).

There is no sane solution to add current user to pkg-build
group using sudo [1].  Use pkexec for this instead. This works
better if user isn't configured in sudo, but worse on remote
connections like ssh. This trade-off seems reasonable.

Keep sudo configuration for running jobs as pkg-build user,
no point changing that.

[1] http://www.sudo.ws/pipermail/sudo-users/2014-January/005397.html
lpf-gui: refactor: kill some builder_.
manpages: Add lpf-gui separate page.
lpf-gui: adding icons and .desktop file, README update.
lpf-gui: Handle symlinked invocation.
README: msttcore-fonts: include build rpm, update.
screenshots: adding lpf-gui (2 files).
lpf-gui: Bugfix.
lpf-gui: do_build: Don't use watch cursor.
lpf-setup-pkg: Add some comments.