Renamed script init method

refs https://github.com/TryGhost/members.js/issues/6

- Renames script initialization method from `initMembersJS` to simply `init`
- Updates readme

ghost/portal/README.md

@@ -13,14 +13,12 @@ To load members.js in any Ghost theme, add below code in theme's `default.hbs` b
 <script src="https://unpkg.com/@tryghost/members-js"></script>
 <script>
     // Initializes members.js
-    window.GhostMembers.initMembersJS({
-      adminUrl: 'https://youradminurl.com'
+    window.GhostMembers.init({
+      adminUrl: 'https://youradminurl.com' // Ex. localhost:2368/ghost
     });
 </script>
 ```
 
-Temp Note: You'll need [local Ghost setup](https://github.com/TryGhost/members.js#in-your-local-ghost-setup) on `membersjs` branch for member APIs to work at the moment.
-
 ## Basic Setup
 
 1. Clone this repository:
@@ -38,19 +36,7 @@ yarn
 
 ## Configure for local development
 
-#### In your local Ghost setup:
-
-- Add `rish-upstream` as remote on your local Ghost repo -
-```
-git remote add rish-upstream git@github.com:rishabhgrg/Ghost.git
-```
-
-
-- Fetch and checkout membersjs branch from the remote -
-```
-git fetch rish-upstream membersjs && git checkout membersjs
-```
-- Ensure your local Ghost is running
+Only useful for active UI development without publishing a version on unpkg. Always use the unpkg link for testing latest released members.js.
 
 #### In this repo(Members.js):
 
@@ -64,7 +50,7 @@ git fetch rish-upstream membersjs && git checkout membersjs
 <script src="{{asset "built/members.min.js"}}"></script>
 <script>
     // Initialize members.js
-    window.GhostMembers.initMembersJS({
+    window.GhostMembers.init({
         adminUrl: 'youradminurl.com'
     });
 </script>

ghost/portal/src/index.js

@@ -9,7 +9,7 @@ function addRootDiv() {
     document.body.appendChild(elem);
 }
 
-function initMembersJS(data) {
+function init(data) {
     addRootDiv();
     ReactDOM.render(
         <React.StrictMode>
@@ -20,11 +20,11 @@ function initMembersJS(data) {
 }
 
 window.GhostMembers = {
-    initMembersJS: initMembersJS
+    init: init
 };
 
 // This will automatically load for local if an .env.development.local file is present
 if (process.env.REACT_APP_ADMIN_URL) {
     const adminUrl = process.env.REACT_APP_ADMIN_URL;
-    initMembersJS({adminUrl});
+    init({adminUrl});
 }