Bulk Data Entry batch changes needed to work with Financial Transaction batches

(This work should be done AFTER merge of trunk.civiaccounts branch.)
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1. Add new Batch Status option value to batch_status group = 'Data Entry'
2. Batches created via Bulk Data Entry are assigned 'Data Entry' status when created.
3. Remove Status filter (dropdown) from Bulk Data Entry search form (civicrm/batch?reset=1)
4. Bulk Data entry listing should only show batches with status = 'Data Entry'
5. Post Process changes (Validate and Process Batch):

• create contribution + line-item + financial_item for each batch entry
• modify the insertion of entity_batch rows so that linkage is from batch to financial_item rows rather than to contribution rows

NOTE: after bulk data entry batch is processed, it's status should be Closed (this is already how it works - just verifying here).
NOTE: Closed bulk data entry batches should have the same structure as batches created via New Financial Transaction batch. User should be able to export, reopen etc.