added english localization

[meabook] / constants.py

# item types
TYPE_DIRECTORY = 'd'
TYPE_FILE = 'f'

# fields
FIELD_TOPLEVEL = 'o'
FIELD_MIDDLELEVEL = 'ou'
FIELD_LOWLEVEL = 'cn'
FIELD_PHONE_HOME = 'homePhone'
FIELD_PHONE_GENERAL = 'telephoneNumber'
FIELD_PHONE_INTERNAL = 'internalPhone'
FIELD_PHONE_MOBILE = 'mobile'
FIELD_IMAGE = 'image'