Re-implement message wrappers

[abbiemery]

With the latest release we have changed the format of the adapters. In this new format we removed the command interpreter wrappers given that they were implemented in a fairly clunky manner and were not yet used by anybody. They were created to support the development of a simulated PMAC device, which has since been dropped in priority.

I am using this issue to collate references to the work done and that was left outstanding for the wrappers. The goal is to re-implement them within the new format when the demand is there.

Merged:
PRs:

• Add support for removing fixed-length headers from interpreted messages #80
• 77 multiple commands from a single message #82
• #88: Add JoiningInterpreter #89

Not completed:

Issues:

• Allow Command to parse AnyStr #92
• Have RegexCommand.parse return more information #93
• Interrupt should return a future #84

PRs:

• MultiCommandInterpreter #90
• Add DecodingInterpreter and EncodingInterpreter #91
• 93 change regex command #94