* 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
* Add SHL, SHR, SAR opcodes
* Add have_bitwise_shifting schedule flag
* Add all EIP tests for SHL
* Add SHR implementation and tests
* Implement SAR and add tests
* Add eip145transition config param
* Change map_or to map_or_else when possible
