CloudServiceConfigurationMaker to customize .cscfg

[smoothdeveloper]

See #155

[isaacabraham]

LGTM. Thoughts @eiriktsarpalis ?

[eiriktsarpalis]

Could you possibly replace the CloudServiceConfigurationMaker type with an interface? Then Default could be represented as a singleton instance just use an optional on the interface internally. I'd prefer it if the public APIs remained as C# friendly as possible.

[smoothdeveloper]

@eiriktsarpalis:

public interface ICloudServiceConfigurationMaker{
    string BuildConfiguration();
}

and if None is passed, we use the original function (like I'm doing now with Default)?

What if I'm doing an overload? the interface idea is not really F# friendly (despite object expression, this will be noisy in F#)

Shouldn't we pester roslyn/C# team so they introduce DU the way F# has them and also start to support FSharpFunc as first class way to compile their lambda? 😄

[smoothdeveloper]

Note that all optional parameters are using FSharpOption which currently is not too C# friendly neither (without additional helpers).

[eiriktsarpalis]

@smoothdeveloper If the builder function does not take any parameters (as that Custom lambda currently does), then it might as well be replaced by string.