Allow the new bank statement reconciliation to search in transaction_ref

Require https://github.com/odoo/odoo/pull/3025 to be merged to work!
Singular of criteria: criterion
Merge pull request #54 from guewen/base_transaction_id-new-bank-statement-reconcile

Allow the new bank statement reconciliation to search in transaction_ref
Merge remote-tracking branch 'upstream/8.0' into 8.0