Adapted to recent BlockChain -> ChainManager rename.

The Sha3 test contained the wrong expected result. Note that the
implementation hasn't changed, the test simply contained an outdated
expected value that was valid for the previous implementation.

initial commit of p2p package

Merge eth-go repo into go-ethereum

mist, etheruem have been moved to cmd/

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* Stack Error shouldn't revert to previous state
* Updated VM Test tool
* Added Transfer method to VM Env

We can't use our own logger because it hasn't been set up properly at
that point.

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