CLI `export' fails in non-UTF8 environments

Created by: MaciekChudek

Running `hamster export' in a non-UTF8 bash environment (e.g., when $LANG is set to 'C', which implies ASCII encoding and is the default on many systems) throws:

UnicodeEncodeError: 'latin-1' codec can't encode character u'\u2013' in position 757: ordinal not in range(256)