Update install-plugin-from-Gist

[bph]

Use the shorthand "login": true

The current steps

  {
    "step": "writeFile",
    "path": "/wordpress/wp-content/plugins/0-plugin.php",
    "data": {
  	"resource": "url",
  	"url": "https://gist.githubusercontent.com/ndiego/456b74b243d86c97cda89264c68cbdee/raw/ff00cf25e6eebe4f5a4eaecff10286f71e65340b/block-hooks-demo.php"
	}
},
  {
  	"step": "activatePlugin",
  	"pluginName": "Block Hooks Demo",
  	"pluginPath": "0-plugin.php"
  }
  

Becomes: 

{
"step": "installPlugin",
"pluginData": {
"resource": "literal:directory",
"name": "block-hooks-demo",
"files": {
"0-plugin.php": {
"resource": "url",
"url": "https://gist.githubusercontent.com/ndiego/456b74b243d86c97cda89264c68cbdee/raw/ff00cf25e6eebe4f5a4eaecff10286f71e65340b/block-hooks-demo.php"
}
},
"options": {
"activate": true
}
},

[bph]

That installPlugin step would only work with a directory, not a file location.