Merge branch 'develop' into rpcfrontier

cmd/ethtest/main.go

cmd/utils/flags.go

core/block_processor.go

core/block_processor_test.go

core/chain_makers.go

core/chain_manager_test.go

eth/backend.go

ethutil/common.go

p2p/server.go

tests/files/BlockTests/bcBlockChainTest.json

tests/files/BlockTests/bcInvalidHeaderTest.json

tests/files/BlockTests/bcUncleTest.json

tests/files/BlockTests/bcValidBlockTest.json

tests/files/StateTests/stCallCreateCallCodeTest.json

tests/files/StateTests/stMemoryStressTest.json

tests/files/StateTests/stRefundTest.json

tests/files/StateTests/stSystemOperationsTest.json

tests/files/VMTests/RandomTests/201503102037PYTHON.json

tests/files/VMTests/RandomTests/201503102148PYTHON.json

tests/files/VMTests/RandomTests/201503102300PYTHON.json