Allow for LDAP one-step login

Further improvements could be made by skipping the LDAP search when the
create_user option is disabled.  This would turn ldap_filter and
ldap_base into optional fields.
No DEBUG for openerp.tools.translate
Fix ldap in secure mode
Fix UnicodeEncodeError in LDAP login
Add support for LDAP bind suffix
Rename title page
Improve error handling
new: [base_import] custom import function support.
chg: [base_import] refactored python CSV parser part out of the main engine.

This will allow easy implementation of new parsers.
new: [base_import] support of select type for options of a parser.
new: [base_import] can provide fields directly without providing a model.