Use a sequence of ids, values to set fields

review3331003
When saving record don't store target link for one2many to create

When saving an instance if the relation field of a one2many item is set, it
should not try to save it as it will be replaced by the current record. And in
the worst case, the target set could not be valid and so it prevents to store
the instance which doesn't need of this target.

issue3501
review3601003
Use bcrypt to hash password if possible

If bcrypt is not available, it fallbacks to sha1 but it will use bcrypt to hash
new password if available.
The storage uses a simple hashing scheme which eases to add new hashing method
and doesn't rely anymore on the specific Sha field but on Function field.

Thanks to Vishesh Yadav

review1039002