adds support for a portable db import/export format (closes: #1521112) the db-dump and db-restore cwctl commands are enhanced with a --format option (defaults to 'native'). If the format is 'portable', then the system database dump / restore is performed using pure SQL queries and the storage uses picked Python objects in a zip archive.

[system]

db-driver   = postgres
db-host     = localhost
db-port     = 5433
adapter     = native
db-name     = cw_fti_test
db-encoding = UTF-8
db-user     = syt
db-password = syt

[admin]
login = admin
password = gingkow