if a user specifies the unlock-timeout option to the wallet unlock command, cleos runs keosd with --unlock-timeout option

Also added a version and extensions field to abi_def.

Also reduce default_max_transaction_cpu_usage to half of default_max_block_cpu_usage.

update cleos to get account response format (seems like it changed recently), unit-test for delegatebw with transfer, avoid devision by 0 in resource_limits.cpp #3001

This change adds the concept of a wallet being asked to create a new private/public key pair. It is a precursor to hardware key support in the wallet because hardware key stores don’t always have the concept of “importing” a key. It’s also beneficial as it gives an alternative means to `cleos create key` which if not careful can cause a private key to easily weasel its way in to a user’s shell history.

cleos was expecting the old data structure from transaction_trace which changed as part of c1aa8039 EOSIO/eos#2919

- rename "data" to "transaction" based on "-j" output
- reuse get_transactions_func call result for output
Signed-off-by: NJoel <you@example.com>