* use 0-based positions in methods pmmr_leaf_to_insertion_index and bintree_postorder_height; add round_up_to_leaf_pos method
* use 0-based positions in method insertion_to_pmmr_index
* use 0-based positions in method is_leaf
* use 0-based positions in method family()
* use 0-based positions in method is_left_sibling
* use 0-based positions in method family_branch
* use 0-based positions in methods bintree_{left,right}most
* use 0-based positions in method bintree_pos_iter
* use 0-based positions in method bintree_range
* use 0-based positions in method bintree_leaf_pos_iter
* rename last_pos in MMR related structs to size
* use 0-based positions in method prune
* use 0-based positions in method push and apply_output return value
* use 0-based position argument of method merkle_proof
* use 0-based outputs in method pmmr::peaks
* fix peaks() code comments
* refix peaks() code comments
* use 0-based positions in method get_peak_from_file
* use 0-based positions in methods get_data_from_file
* use 0-based positions in methods get_from_file
* use 0-based positions in methods get_data
* use 0-based positions in methods get_hash
* use 0-based positions in method peak_path
* use 0-based positions in method bag_the_rhs
* use 0-based positions in method Backend::remove
* use 0-based positions in method leaf_pos_iter
* use 0-based positions in method self.LeafSet::includes
* use 0-based positions in methods self.LeafSet::{add,remove}
* use 0-based positions in methods is_pruned,is_pruned_root,is_compacted
* use 0-based positions in methods PruneList::append
* use 0-based positions in methods append_pruned_subtree
* use 0-based positions in method calculate_next_leaf_shift
* use 0-based positions in method append_single
* use 0-based positions in method calculate_next_shift
* use 0-based positions in method segment_pos_range
* use 0-based positions in method reconstruct_root
* use 0-based positions in method validate_with
* use 0-based positions in method validate
* rename size (formerly last_pos) to mmr_size
* use 0-based positions in Segment's hash_pos and leaf_pos
* minimize use of saturating_sub(1) and rename some pos/idx to size
* use 0-based positions in methods get_output_pos
* use 0-based positions in method get_unspent_output_at
* use 0-based positions in method get_header_hash
* use 0-based positions in methods MerkleProof::verify{,_consume}
* use 0-based positions in method cleanup_subtree
* don't allow 0 in prunelist bitmap
* use 0-based positions in methods get_{,leaf_}shift
* rename some 1-based pos to pos1; identify TODO
* Address yeastplume's PR review comments
* Chunk generation and validation
* Rename chunk -> segment
* Missed a few
* Generate and validate merkle proof
* Fix bugs in generation and validation
* Add test for unprunable MMR of various sizes
* Add missing docs
* Remove unused functions
* Remove segment error variant on chain error type
* Simplify calculation by using a Vec instead of HashMap
* Use vectors in segment definition
* Compare subtree root during tests
* Add test of segments for a prunable mmr
* Remove assertion
* Only send intermediary hashes for prunable MMRs
* Get hash from file directly
* Require both leaves if one of them is not pruned
* More pruning tests
* Add segment (de)serialization
* Require sorted vectors in segment deser
* Store pos and data separately in segment
* Rename log_size -> height
* Fix bitmap index in root calculation
* Add validation function for output (bitmap) MMRs
* Remove left over debug statements
* Fix test
* Edge case: final segment with uneven number of leaves
* Use last_pos instead of segment_last_pos
* Simplify pruning in test
* Add leaf and hash iterators
* Support fully pruned segments
* Drop backend before deleting dir in pruned_segment test
* Simplify output of first_unpruned_parent
