* 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
* executive tracer builds flat traces without intermediate struct
* temporarilt commented out tests for traces
* fixed new way of building trace address
* fixed new way of building trace address
* updating state tests with flat tracing in progress
* fixed flat tracing tests
* fixed compiling ethcore-rpc with new flat traces
* removed warnings from ethcore module
* remove unused data structures
