Cleaner handling of commands and command args

[reakain]

Command names are currently in their own static list, but the args for each command are currently hardcoded in place. Add some sort of method for tracking/maintaining those arg names and methods?

[BlinkTheThings]

I also think we should have a better separation between different types of commands.
There are three types of commands as of now:

1. Console commands
2. Control commands
3. Message commands

Console commands are not sent over network and configure things on the local machine.
Control commands are sent over the network and are related to user presence, channels, etc.
Message commands are text messages that are sent to groups or individuals.

I want to change the network protocol to support a more well-defined format for control and message commands, while allowing the console interface to present whatever is best form a user interaction standpoint and just call the appropriate methods from the Chatr library.