VIZ Update 11 (3.0.0 version)

[On1x]

List of changes:

• Add tapos props to dynamic_global_property_object for irrevesible block (reduce the number of requests to the node webserver by lang libraries for tapos calculation).
• Add block post validation mechanics (fast forward irreversible block).
• Add fixed_award operation for specific amount of reward.
• Add target_account_sale operation for specific buyer.
• Add account auction mechanics before account sale start time.
• Update fc secp256k1 lib, Boost 1.6.0 lib for support Ubuntu 18.04.
• Update emission mechanics (fixed amount 1.000 VIZ per block).
• Add method for database api plugin: get_accounts_on_auction.
• Add option for account_history, operation_history plugins: history-count-blocks (limit history range, example: 28800 for 1 day range).