Use ``~postgres`` instead of static home dir.
Check for available locales with ``locale -a`` before requiring.
Remove mock.patch for no longer existing import.  This should fix the failing test.
Adjust test to match new code.
Merge branch 'feature/fix_postgres' of git://github.com/disko/fabtools into disko-feature/fix_postgres

Conflicts:
	fabtools/postgres.py
Update changelog