WURFL Rtd Provider: initial version (prebid#5445)

* WURFL Rtd Provider: initial version

* WURFL Rtd Provider: apply linter suggestions

* WURFL Rtd Provider: linter: code blocks should have a language specified

* WURFL Rtd Provider: remove the space between the header and the no_toc

* WURFL Rtd Provider: remove rtdModule dependency reference

dev-docs/modules/wurflRtdProvider.md

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+---
+layout: page_v2
+title: WURFL RTD Provider Module
+display_name: WURFL RTD Module
+description: WURFL Real Time Data Module
+page_type: module
+module_type: rtd
+module_code : wurflRtdProvider
+enable_download : true
+vendor_specific: true
+sidebarType : 1
+---
+
+{: .alert.alert-warning :}
+This module loads a dynamically generated JavaScript from prebid.wurflcloud.com
+
+# WURFL RTD Submodule
+{:.no_toc}
+
+* TOC
+{:toc}
+
+## Description
+
+The WURFL RTD module enriches the OpenRTB 2.0 device data with [WURFL data](https://www.scientiamobile.com/wurfl-js-business-edition-at-the-intersection-of-javascript-and-enterprise/).
+The module sets the WURFL data in `device.ext.wurfl` and all the bidder adapters will always receive the low entry capabilites like `is_mobile`, `complete_device_name` and `form_factor`. 
+
+For a more detailed analysis bidders can subscribe to detect iPhone and iPad models and receive additional [WURFL device capabilities](https://www.scientiamobile.com/capabilities/?products%5B%5D=wurfl-js).
+
+## User-Agent Client Hints
+
+WURFL.js is fully compatible with Chromium's User-Agent Client Hints (UA-CH) initiative. If User-Agent Client Hints are absent in the HTTP headers that WURFL.js receives, the service will automatically fall back to using the User-Agent Client Hints' JS API to fetch [high entropy client hint values](https://wicg.github.io/ua-client-hints/#getHighEntropyValues) from the client device. However, we recommend that you explicitly opt-in/advertise support for User-Agent Client Hints on your website and delegate them to the WURFL.js service for the fastest detection experience. Our documentation regarding implementing User-Agent Client Hint support [is available here](https://docs.scientiamobile.com/guides/implementing-useragent-clienthints). 
+
+## Usage
+
+### Build
+
+```bash
+gulp build --modules="wurflRtdProvider,appnexusBidAdapter,..."  
+```
+
+### Configuration
+
+Use `setConfig` to instruct Prebid.js to initilize the WURFL RTD module, as specified below. 
+
+This module is configured as part of the `realTimeData.dataProviders`
+
+```javascript
+var TIMEOUT = 1000;
+pbjs.setConfig({
+    realTimeData: {
+        auctionDelay: TIMEOUT,
+        dataProviders: [{
+            name: 'wurfl',
+            waitForIt: true,
+            params: {
+                debug: false
+            }
+        }]
+    }
+});
+```
+
+### Parameters
+
+{: .table .table-bordered .table-striped }
+| Name                      | Type          | Description                                                      | Default           |
+| :------------------------ | :------------ | :--------------------------------------------------------------- |:----------------- |
+| name                      | String        | Real time data module name                                       | Always 'wurfl'    |
+| waitForIt                 | Boolean       | Should be `true` if there's an `auctionDelay` defined (optional) | `false`           |
+| params                    | Object        |                                                                  |                   |
+| params.altHost            | String        | Alternate host to connect to WURFL.js                            |                   |
+| params.debug              | Boolean       | Enable debug                                                     | `false`           |
+
+## Testing 
+
+To view an example of how the WURFL RTD module works :
+
+`gulp serve --modules=wurflRtdProvider,appnexusBidAdapter`
+
+and then point your browser at:
+
+`http://localhost:9999/integrationExamples/gpt/wurflRtdProvider_example.html`