* Remove pass-by-reference return data value from executive
* Fix tests
* Fix a missing test output
* typo: wasm_activation_test
* Tracing change in output
* json_tests: fix compile
* typo: 0..32 -> ..32 to keep it consistent with other occurance
* Fix tests
* Feed in ActionParams on VM creation
* Fix ethcore after Vm interface change
* Move informant inside Interpreter struct
* Move do_trace to Interpreter struct
* Move all remaining exec variables to Interpreter struct
* Refactor VM to allow single opcode step
* Fix all EVM tests
* Fix all wasm tests
* Fix wasm runner tests
* Fix a check case where code length is zero
* Fix jsontests compile
* Fix cargo lock
* Use match instead of expect
* Use cheaper check reader.len() == 0 for the initial special case
* Get rid of try_and_done! macro by using Result<(), ReturnType>
* Use Never instead of ()
* Fix parity-bytes path
* Bypass gasometer lifetime problem by borrow only for a instance
* typo: missing {
* Fix ethcore test compile
* Fix evm tests
* Update `add_license` script
* run script
* add `remove duplicate lines script` and run it
* Revert changes `English spaces`
* strip whitespaces
* Revert `GPL` in files with `apache/mit license`
* don't append `gpl license` in files with other lic
* Don't append `gpl header` in files with other lic.
* re-ran script
* include c and cpp files too
* remove duplicate header
* rebase nit
