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

[*] Fixed some issues

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

[+] Hashlist of chains

Feature908

[*] License information changed