pkg-groups: rewrite for Profiles
Say more about possibilities of Centaurus.
add mention about EFI
Update network-manager screenshots
Add screens representing alterator gui
Remove repeating of same information. Add link to fix missing subchapter.
Update images (cheating included)

Cheating:
	Edit images to remove mention about RC
	to increase version from 6.9.9 to 7.0.0

List of edited images:
	install-guide/images/boot.png
	firstrun/images/firsttime.png
	install-guide/images/license.png
	install-guide/images/release-notes.png
	system-start/images/system-boot.png
Change casing (from upper case to lower one)
Rename Chapters
Actualize information about how to run Synaptic from GUI
services/index.txt: periphrase
Add links to "Net-Domain" documentation.
Perephrase.
add comma
improve information about setting up internet connection
Make label shorter via removing one word and symbol "/"
add brackets: SMTP, POP3/IMAP -> (SMTP, POP3/IMAP)
Improve chapter about "backup"
Update info about repositiries
packages/manually/manually-add-repo.txt: Update example
Change "apt-get upgrade" to "apt-get dist-upgrade"