[*] File load/save operations
[*] Some general functions for datums
[*] Mostly complete topmost abstractions for blockchain manipulations

[+] Datum operations functions
[*] Consensus and class are splitted. Class is for feature usage.
[*] Added const* everywhere (almost)

[-] Removed cache init calls
[*] Splitted token byt tx_item_token, token itself and token_emission

added creation of transfer transaction by addr and sum in cache
fixed errors in the  transaction cache
modify create items functions

[+] Datum now inherits from dap_chain_t
[*] Lot of small changes

[*] License information changed

[-] srv files moved to lib-dap-chain-srv*
[*] Other moves and renames, sections->datums

[+] Declarations for chain operations
[+] Block cache
[+] Block dump
[*] Some internal fixes

[+] Wallet delcarations

[+] Transactions and transaction items
[*] Some renames mostly related to section

[+] HashFusion from brian.monahan@hpe.com (c) Copyright 2017 Hewlett Packard Enterprise Development LP
[+] wrapper for hash functions moved also from libdap/crypto