Create package @converse/headless

package.json

@@ -35,6 +35,7 @@
     "@babel/cli": "^7.1.0",
     "@babel/core": "^7.1.0",
     "@babel/preset-env": "^7.1.0",
+    "@converse/headless": "^4.0.2",
     "@fortawesome/fontawesome-free": "5.3.1",
     "awesomplete-avoid-xss": "^1.1.2",
     "babel-loader": "^8.0.0",

packages/headless/package.json

+{
+  "name": "@converse/headless",
+  "version": "4.0.2",
+  "description": "Converse.js Headless build",
+  "author": "cmrd Senya <senya@riseup.net>",
+  "homepage": "https://github.com/jcbrand/converse.js",
+  "license": "MPL-2.0",
+  "main": "converse-core.js",
+  "files": [
+    "**/*.js",
+    "templates/*"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/jcbrand/converse.js.git"
+  },
+  "scripts": {
+    "test": "echo \"Error: run tests from root\" && exit 1"
+  },
+  "bugs": {
+    "url": "https://github.com/jcbrand/converse.js/issues"
+  },
+  "gitHead": "9641dcdc820e029b05930479c242d2b707bbe8e2",
+  "dependencies": {
+    "backbone": "1.3.3",
+    "backbone.browserStorage": "0.0.3",
+    "backbone.nativeview": "^0.3.3",
+    "backbone.overview": "^1.0.2",
+    "backbone.vdomview": "^1.0.1",
+    "es6-promise": "^4.1.0",
+    "filesize": "^3.6.1",
+    "jed": "1.1.1",
+    "lodash": "4.17.10",
+    "moment": "~> 2.19.3 ",
+    "pluggable.js": "2.0.0",
+    "sizzle": "^2.3.3",
+    "strophe.js": "strophe/strophejs#a2692dcfdaf7d591254ac73f3d8584992b6f8da7",
+    "strophejs-plugin-ping": "0.0.1",
+    "strophejs-plugin-rsm": "0.0.1",
+    "urijs": "^1.19.1"
+  }
+}