manage: write to stdout with utf-8 encoding
manage: write to stdout with utf-8 encoding

without this failures such as:

UnicodeEncodeError: 'ascii' codec can't encode character u'\u2588' in position 0: ordinal not in range(128)

would occur

heartsucker/securedrop,garrettr/securedrop,conorsch/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,conorsch/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,conorsch/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,garrettr/securedrop,conorsch/securedrop,ehartsuyker/securedrop,garrettr/securedrop,heartsucker/securedrop,heartsucker/securedrop,garrettr/securedrop,conorsch/securedrop