Tweaks and fixes

• Reworked cash reconcile / GL Reconile report into a new powerful report that generates partial trial balances from the general ledger allowing various groupings / filtering. For example get a list of all GL postings touching BAS tax codes and/or cash instrument codes, aggregated by txn type. Useful as an alternative source of data for extracting and moving data into an external accounting product (as opposed to using biz activity report)
• Bug fix : print statement for combined trial balance. Extracted open/close balance is wrong and would report historical aged balances as all zeros no matter what. Only a problem in combined statement mode, worked fine otherwise. Now fixed (Bug introduced on migration to 5.2)
• Edit deal : add calendar convenience functions for promise date