less source highlight filter; xfce dim screen.

Less source highlight filter.
Xfce dim screen before screen lock.
xchainkeys: skippy-xd on double w for h6
Merge branch 'h5-ubuntu-danil' into h6-gentoo-danil

Conflicts:
	.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-power-manager.xml
emacs: less mode for org and help modes
Merge branch 'h6-gentoo-danil' into h5-ubuntu-danil
minor
emacs: column-marker for readonly buffers too
Merge branch 'h5-ubuntu-danil' into h3-gentoo-danil