install-guide/vm: translate / typo fix
desktop-software..pidgin: update supported protocol list
desktop-software..thunderbird: update for no menu File
Merge branch 'master' into centaurus

Conflicts:
	desktop-software/internet/mail/thunderbird/index.txt
proofreading (thanks to Olga Pascenko)
proofreading (thanks to Olga Pascenko)
actualisation: Mac OS -> OS X
actualisation
install-guide/boot: reorder boot options / add missing menus
alternative-install.txt: update of outdated link
alternative-install.txt: order of sources was changed to match real menu
alternative-install.txt: added screenshot boot.png
system-start/system-login-dm: adaptation for MATE
desktop-mate: proofreading
system-start: updated screenshots
overall spellcheck

http://webmaster.yandex.ru/spellcheck.xml
overall spellcheck

http://webmaster.yandex.ru/spellcheck.xml
Merge branch 'master' into centaurus

Conflicts:
	admin-basics/terminal/basic/docs-linux_intro.txt
	desktop-software/file-manager/index.txt
	desktop-software/file-manager/thunar/index.txt
	desktop-software/others/medit/index.txt
	desktop-xfce/index.txt
desktop-mate: typo fix
system-management/acc: typo: added missing space