Moved ethchain to chain

block_pool.go

chain/.gitignore

chain/asm.go

chain/block.go

chain/bloom.go

chain/bloom9.go

chain/bloom9_test.go

chain/bloom_test.go

chain/chain_manager.go

chain/chain_manager_test.go

chain/dagger.go

chain/dagger_test.go

chain/derive_sha.go

chain/error.go

chain/events.go

chain/fees.go

chain/filter.go

chain/filter_test.go

chain/genesis.go

chain/helper_test.go