Extract STRING and i18n definitions to separate headers
Move LANG global variable into ui.c
Implement language detection by POSIX locale
Use new language detection in xlib client
Implement language detection by Windows language id
Use new language detection in win32 client
Merge branch 'better-i18n-take-three' of https://github.com/albel727/uTox

#
# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.