#example task for BTR
btr.loadGist({ url: 'https://gist.github.com/', id: '5ec0eb5d78fbcb6715c3'}, function(){
btr.contextMenu('body', {
'perfmap' : btr.load('https://zeman.github.io/perfmap/perfmap.js'),
'dataurl' : btr.load('https://cdn.rawgit.com/bgrins/devtools-snippets/master/snippets/dataurl/dataurl.js'),
'printliminator': btr.load('https://css-tricks.com/examples/ThePrintliminator/js/printliminator.js', function(){