Allow a node to declare what settings should be made available to the editor.

[Kazuki-Nakanishi]

Implement register/exportNodeSettings.
This implementation is the enhancement derived from the trello note below.
https://trello.com/c/jmFK6hAb/87-allow-a-node-to-declare-what-settings-should-be-made-available-to-the-editor

For example, change registerType of the core node "21-httprequest.js" to as follows.

    RED.nodes.registerType("http request",HTTPRequest,{
        credentials: {
            user: {type:"text"},
            password: {type: "password"}
        },
        settings: {
            httpRequestColour: {
                value: "red",
                exportable: true
            }
        }
    });

Then access to http://localhost:1880/settings, and you'll see the node setting.

[coveralls]

Coverage decreased (-3.5%) to 84.211% when pulling 22b4ac6 on Kazuki-Nakanishi:nodeSettings into fca77a8 on node-red:nodeSettings.

[coveralls]

Coverage decreased (-3.5%) to 84.211% when pulling 22b4ac6 on Kazuki-Nakanishi:nodeSettings into fca77a8 on node-red:nodeSettings.

[knolleary]

I suggest the function should be callednormaliseNodeTypeName.

The current approach to remove characters is a good start, but I think it should honour camel-case: 'http-request' should become 'httpRequest', not 'httprequest' as it would with the current implementation.

[Kazuki-Nakanishi]

Thank you very much for pointing it out. I fixed both of them and push the code.

[coveralls]

Coverage decreased (-3.4%) to 84.243% when pulling 4b16f5f on Kazuki-Nakanishi:nodeSettings into fca77a8 on node-red:nodeSettings.