* 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

singleton takes code and scope as runtime-parameters, global_state_singleton restored in system contract, hack to prevent llvm-linker from removing apply function #2227

system contract refactoring - move code from .hpp to .cpp, use new dispatcher (some code temporarily commented out) #2227