* 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
