message: add compiler result field
  ref: CompiledResult type at flow/compiler.js
diff: @@ -22,6 +22,7 @@ Compiles a template string and returns compiled JavaScript code. The returned re
  ``` js
  {
  + ast: ?ASTElement, // parsed template elements to AST
  render: string, // main render function code
  staticRenderFns: Array<string>, // render code for static sub trees, if any
  errors: Array<string> // template syntax errors, if any
  