master->feature2272

[*] dap_chain_atom_t -> dap_chain_atom_ptr_t

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

Feature 2272

Merge branch 'feature-2272' of https://github.com/kelvinblockchain/libdap-chain.git into feature-2272

[*] Fixed const* issues

[*] Complete UTXO API with tokens, tokens emissions and tx token.
[*] Fixed calc ballance
[*] dap_chain_addr changed is internal structure a little, same with related macro defines
[*] Others renames and refactors

bring to master

[+] 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

deleted Glib

Feature 2152

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

Created the first transaction in the chain which includes token, in, out

and sign items.
Added auxiliary functions for working with transaction items

Feature 2152

modify structs for transaction items (dap_chain_tx_*)

update from master

[+] Added some headers

add datum items maniplation functoin