Bridge plugin

[gdude2002]

With the somewhat-completion of #19, we can start looking at this.

A configurable bridge-relaying plugin. Take chat from anywhere, on any protocol, and send it anywhere else, on any protocol (including the same one).

I don't feel like this will be difficult. A couple things to consider are related to how the configuration file is laid out - How do we differentiate usernames and channel names on protocols that don't? How do we make it a "rich" configuration without making it cumbersome?

Obviously, the config will be reloadable; I don't plan on adding configuration-by-command yet.

[rakiru]

For differentiating between users and channels, one way would be to default to channels, and have an optional field to specify the type, user or channel.

[gdude2002]

Yeah, I'm thinking that may be the way to go as well.

[gdude2002]

Basic bridge plugin is done - need to make a couple config changes and then add support for various protocols directly as some relaying methods will need their own formatting.

[gdude2002]

This requires a rewrite. <-- note to myself

[gdude2002]

Closing in favour of #68