* update pibd copy test to use new desgmenter structure
* begin reconstruction of output pmmr
* clean up hash/leaf insertion logic
* push pruned subtree appears to be working, now also calculates left hand hashes correctly
* factor out ordering of segment/hash order array
* refactor for pmmr application code
* test of chain copy appears to be working
* add rangeproof functions to desegmenter
* add kernel functions, attempt refactor
* small test cleanup, reconstruction of live chain working in manual copy test
* application of received bitmap segments to local accumulator
* add all required elements to send/receive output segment requests and responses
* testing of output sync
* add special cases to pmmr segment request
* add functions to desegmenter to report next desired segments, begin to add state to determine which segments have been requested
* add segmentidentifier type to id requested segments uniquely
* make a call on where to keep track of which PIBD segments have been requested
* move segmenttype definition, add functions to manipulate peer segment list
* remove desegmenter state enum
* change chain desegmenter function to provide rwlock
* trace, warning cleanup
* udpate to test compliation
* experimental addition of pibd download state for testnet only
* fixes to bitmap number of segments calculation + conversion of bitmap accumulator to bitmap
* attempt to call a test message
* add p2p methods for receiving bitmap segment and applying to desegmenter associated with chain
* fixes to state sync
* initial commit of WIP pibd explorations
* correct calling for obtaining and validating first segment
* update test to properly iterate through each segment of the test pmmrs, validating each segment as it goes
* updated test to fully segment and validate PMMRs from compacted and uncompacted sample data. Also contains method of running test againt live chain data
* remove logger change
* change test file name
* change test file name
* change directory reference in test for CI
* add initial (experimental) structure for PIBD desegmenting
* move bitmap desegmentation logic into desegmenter
* added txhashset methods to apply pibd segments (note this only works for fully unpruned trees atm)
* change last_pos to mmr_size
* fix to pmmr::peaks call
* don't verify POW when copying headers
* prepare for commit of work thus far'
* update test paths
* few updates based on early review
