Merge branch 'develop' into qt5.4

accounts/abi/abi.go

accounts/abi/abi_test.go

accounts/abi/doc.go

accounts/abi/numbers.go

accounts/abi/numbers_test.go

accounts/abi/profile.cov

accounts/abi/type.go

accounts/account_manager.go

accounts/accounts_test.go

crypto/crypto.go

crypto/key.go

crypto/key_store_passphrase.go

crypto/key_store_plain.go

crypto/key_store_test.go

gocoverage.sh