(Chapter 12 case involves appeal from bankruptcy court order which granted trustee's motion to disburse unsecured funds denying any funds to appellant bank who did not file proof of claim; court did not view bank's pleadings to be informal proofs of claim allowing creditor to file formal proof of claim that would relate back to date informal proof filed; court held that pleadings did not meet all requirements as specified by Tenth Circuit to qualify as informal proof of claim; bankruptcy court order affirmed).