Add an interface for parsing raw data (byte[])

[bfjm]

Is your feature request related to a problem? Please describe.
Use String to pass messages. String is immutable, but many String objects cannot be reused

Describe the solution you'd like
Add an interface for message.fromBytes

Describe alternatives you've considered
Use ByteBuffer instead

Additional context
In a trading system, we want to reduce gc and increase object reuse, and if we think in terms of byte[], object reuse will increase

[chrjohn]

Thanks. Are you able to submit a PR?