Export the same fields as Password Exporter to be compatible with it

[sanvila]

It would be great if ffpass could read and import (and export) the same csv files created by the old Password Exporter.
Format was like this:

# Generated by Password Exporter; Export format 1.1; Encrypted: false
"hostname","username","password","formSubmitURL","httpRealm","usernameField","passwordField"

In fact, ffpass does not work 100% for me because in some sites the httprealm field is relevant.

[sanvila]

Hi. I managed to read and write in the same format as the old "Password Exporter" so I decided to share the changes here:

sanvila@c9ad835