Renamed block_chain to chain_manager

block_pool.go

ethchain/block_manager_test.go

ethchain/chain_manager.go

ethchain/chain_manager_test.go

ethchain/filter.go

ethchain/state_manager.go

ethchain/transaction_pool.go

ethereum.go

ethminer/miner.go

ethpipe/js_pipe.go

ethpipe/pipe.go

peer.go

tests/vm/gh_test.go

vm/vm_debug.go