Invalid README examples (#2247)
Invalid README examples (#2247)

* Invalid README examples

1. Blockchain cannot be used to initiate an EVM, it is not "EVMOpts". 
2. "gasUsed" is not of type "ExecResult"

* Update README.md
ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm