Id5 analytics adapter: initial release documentation (#2999)

* first draft of id5 analytics adapter docs

* update links and example

dev-docs/analytics/id5.md

@@ -0,0 +1,38 @@
+---
+layout: analytics
+title: ID5
+description: ID5 Analytics Adapter
+modulecode: id5Analytics
+gdpr_supported: true
+usp_supported: true
+prebid_member: true
+gvl_id: 131
+enable_download: false
+---
+
+#### Registration
+
+The ID5 Analytics Adapter is free to use during our Beta period, but requires a simple registration with ID5. Please visit [id5.io/solutions](https://id5.io/solutions#publishers) to sign up and request your ID5 Partner Number to get started. If you're already using the ID5 Universal ID, you may use your existing Partner Number with the analytics adapter.
+
+The ID5 privacy policy is at [https://id5.io/platform-privacy-policy](https://id5.io/platform-privacy-policy).
+
+#### Analytics Options
+
+{: .table .table-bordered .table-striped }
+| Parameter | Scope | Type | Description | Example |
+| --- | --- | --- | --- | --- |
+| provider | Required | String | The name of this module: `id5Analytics` | `id5Analytics` |
+| options.partnerId | Required | Number | This is the ID5 Partner Number obtained from registering with ID5. | `1234` |
+| options.eventsToTrack | Optional | Array of strings | Overrides the set of tracked events | `['auctionEnd','bidWon']` |
+
+
+### Example Configuration
+
+```javascript
+pbjs.enableAnalytics({
+    provider: 'id5Analytics',
+    options: {
+        partnerId: 173    // change to the Partner Number you received from ID5
+    }
+});
+```