Create Swift types for Soy. Below table describes Java types.

Add message bundles support.
Reference: https://developers.google.com/closure/templates/docs/java_usage#creatingmessagebundles

Tests are waiting proper implementation!

Add compile-time globals support.
Reference: https://developers.google.com/closure/templates/docs/java_usage#globals

A general guide for Java based rendering is as follows:

    SoySauce soySauce = new SoySauceBuilder().build();
    SoySauce.Renderer renderer = soySauce.renderTemplate("com.codeandsoda.soytest.test");
    String result = renderer.render().get();
    System.out.println(result);

Create supporting types in SoyKit so we can write this piece easily in Swift.

Reference doc https://github.com/google/closure-templates/blob/master/documentation/codelabs/helloworlds/helloworld_java.md

I realized that string values are not checked if they contain integer or floating point numbers. If so they can be treated as numbers so all arithmetics can be done with them.
Check and fix current implementation, particularly plus and minus operators.

Support resolving data access like data["boo"]["goo"]

Currenty, Closure Templates compiler generates code that returns assembled output.
Replace it with a robust solution introducing Appendable protocol like below,

protocol Appendable {
    func append(soyValue: SoyValue)
    func append(safeContent: SanitizedContent)
    func append(string: String)
}

So renderer signature will be changed to

(Appendable, [String:SoyValue], [String:SoyValue])

Check if the following module satisfies our needs https://github.com/slashmo/gsoc-swift-baggage-context/issues

Requirements: TBD