Adds two implementations of Base64 encoding as specified in RFC4648.
Implementation (1) uses inline assembly, while Implementation (2) is
written purely in Solidity.
Assertions are added to replicate the test vectors specified in the RFC
for Base64 to ensure both implementations to specification.
removed libevmone.so files from the directory
trial test cases extracted from SoliidityEndToEndTest.cpp into .sol files. Corresponding code in the .cpp file has been commented instead of begin removed pending preliminary reviews
removed libevmone files
Added testcase packed_storage_structs_delete
added test case invalid_enum_logged
added test case enum_referencing
added test case memory_types_initialisation
added test case return string
added test case constant_string_literal.sol
removed extractable keyword from solidityEndtoEnd.cpp, moved copying_bytes_multiassigned.sol to array/copying folder, added recv() function to copying_bytes_multiassigned.sol but this test case is failing now
change typo error in the name of test case library_staticcall_delegatecal.sol to library_staticcall_delegatecall.sol
Added compileToEwasm:false to call_forward_bytes.sol test case and moved it to semanticTests/fallback
added compileToEwasm:false line to library_call_in_homestead
added compileToEwasm: false line to copying_bytes_multiassign, copy_from_calldata_removes_bytes, enum_referencing, library_call_in_homestead, struct_referencing
Added test case internal_types_in_library
Added test case mapping_arguments_in_library
Added test case mapping_returns_in_library
Added test case mapping_returns_in_library_named
Added test case using_library_mappings_public
Added test case library_function_external
Added test case library_stray_values
added test case using_library_mappings_return
added test case using_library_structs
Added test case using_for_function_on_struct and corrections to using_library_structs, using_library_mpapings_return, library_stray_values
Added test case using_for_overload
added test case using_for_by_name
added test case bound_function_in_function
added test case bound_function_in_var
added test case bound_function_to_string
added test case payable_function_calls_library
added function call corrections to copying_bytes_multiassign and call_forward_bytes
Made changes to the test cases as per comments on PR #12289
mentioned in Changelog.md : Extraced some test cases from SolEndToEnd.cpp
