title: It's possible to use Environment functions in gulp-nunjucks-render?
body: <p>I want to use something like <a href="https://github.com/carlosl/gulp-nunjucks-render#nunjucks-rendercontext" rel="nofollow">Nunjucks render</a>, but with another function. For example <a href="http://mozilla.github.io/nunjucks/api.html#addglobal" rel="nofollow">addglobal</a>.</p>
  
  <p>Is it possible?</p>