translation added __()
bug fix for permission manager, missed filedname which lead translated get_input failed.
in addition to that, vaiours __() added.
fixed exporters according to suggestion.
translations:
1. customize form
2. comment
3. editor
4. message
5. assign to
added translation for:
1. user
2. module setup
3. user creation notification
4. 404
5. toolbar update
fixes according to review:
1. use {{ }} if in html
2. export.py and import.py, move import from at top line
Merge pull request #844 from 81552433qqcom/d1

Translation for exporter.py