* Removed some strange code that didn't apply state reverting properly
* Refactored code setting from vm & state transition to the executioner
* Updated tests
Conflicts:
common/registrar/ethreg/api.go
core/tx_pool.go
core/vm/jit_test.go
* change gas cost for contract creating txs
* invalidate signature with s value greater than secp256k1 N / 2
* OOG contract creation if not enough gas to store code
* new difficulty adjustment algorithm
* new DELEGATECALL op code
Conflicts:
core/vm/environment.go
crypto/crypto.go
crypto/secp256k1/secp256.go
eth/api.go
