Order and select Pipeline resources from JSON

[mwanji]

Allow pipeline to be configured from global options like any other resource. Resources array determines which processors, etc. are used, and in which order, overriding classpath loading.

{
  options: {
    pipeline: {
      resources: ["compression", "bootstrapLess"]
    }
  }
}

[mwanji]

Done with [options.pipeline.elements]