Should allow module reference as plugin

[shakyShane]

Because, you'd expect this to work, but it currently doesn't

var browserSync  = require("browser-sync").create();
var htmlInjector = require("bs-html-injector");

browserSync.init({
    server: ["test/fixtures"],
    files: ["test/fixtures/css/**"],
    plugins: [htmlInjector]
});

the solution without a fix, is any of the following, which turns out to not always be appropriate.

var browserSync  = require("browser-sync").create();

browserSync.init({
    server: ["test/fixtures"],
    files: ["test/fixtures/css/**"],
    plugins: ["bs-html-injector"] // works because a string results in a require() call
});

var browserSync  = require("browser-sync").create();
var htmlInjector = require("bs-html-injector");

browserSync.init({
    server: ["test/fixtures"],
    files: ["test/fixtures/css/**"],
    plugins: [
        {
            module: "bs-html-injector", // works because of inline plugin support
            options: {}
        }
    ]
});