Update `TemplateCompiler` transform step to use abstractions used by the render `Compiler`. For example, template code is now loaded via an instance of `TemplateLoader` and external resources are fetched via an instance of `XHR`.
Update `TemplateCompiler` transform step to use abstractions used by the render `Compiler`. For example, template code is now loaded via an instance of `TemplateLoader` and external resources are fetched via an instance of `XHR`.