* clean up configuration parameters
* use dynamic max_inline_action_size configuration parameter to limit size of inline actions
* use dynamic max_inline_action_depth to limit recursion depth of inline actions
* change deferred_trx_expiration_window parameter into a dynamic configuration parameter
* add numerator and denominator configuration parameters for later context free data discount implementation
* bill delayed transaction for the additional net usage of the eventual retirement of the deferred transaction

 - added CFA cpu usage discount
 - added max transaction net and cpu usage
 - refactored trace data structures to resolve cyclic dependencies in header files
 - refactored accounting code in chain controller for a little more clarity
 - refactored lock processing and put them in the associated block/transaction traces

From a script by @joneric.

abi for eosio.system contract, draft of unit-test, get_blockchain_parameters API function, asset switched to signed int64_t, fixes