create if not exist

added exit when using -U since updating mirrorlist fails on an empty chroot
updated docs

fixed typo

updated docs

refactoring code to match #105
updated pot file
updated docs/man
updated CHANGELOG

updated texts
updated docs
updated makefile
updated tests
removed deprecated arguments

updated texts
updated help texts for arguments

renamed -u/--update to -y/--sync

removed NoUpdate configuration
remove --no-mirrorlist from api to standard options
move check for --no-mirrorlist to after downloading mirror files

removed -y, --sync confusing - not build pacman I must remind myself

renamed write_configuration() to api_write_only_country()

Runs `pacman -Syy` after mirrorlist generation