Client plugins

[janza]

Support for loading additional scripts on frontend.
Added basic hooks for plugins to client script.

Scripts can be added to ~/.shout/plugins directory.

Registering a plugin:

shoutPlugins.push({
    onmessage: function(message) { console.log(message); },
    onprerender: function(name, data) { console.log(data); },
    onppostrender: function(name, html) { console.log(html); }
})

[ctian1]

Whoa, really cool, does this mean users can add their own plugins?

[janza]

Yes, I've added some basic hooks for plugins.
There should probably be more, but this works for a start (text replacement for example).

[spencerthayer]

AMAZEBALLS! Thank you.

[AlMcKinlay]

@astorije Would this work as a base for the package system? It might have quite a few merge conflicts because it has been over a year, but might be worth starting if @janza is worth updating it? It looks like this was never looked at.