Updating documentation for districtmDMX for version 1+ (#876)

* updating documentation for districtmDMX for prebid v1+

* adding some spacing

* Update districtmdmx.md

Added examples to 0.34 and 1.0+, type to 1.0+

* Update districtmdmx.md

I made a mistake! Can you make sure it's a string for the floor param?

* adding prebid_1_0_supported tag

this is how to to get your adapter to show up in the 1.0 downloads list

dev-docs/bidders/districtmdmx.md

@@ -2,25 +2,37 @@
 layout: bidder
 title: DistrictmDMX
 description: Prebid DistrictmDMX Bidder Adaptor
-
 top_nav_section: dev_docs
 nav_section: reference
-
 hide: true
-
-biddercode: districtmDMX
-
+biddercode: districtmDmx
 biddercode_longer_than_12: false
+prebid_1_0_supported : true
+---
 
 
----
 
 ### bid params
+##### Setting for Prebid version 1.0 and above.
+
+{: .table .table-bordered .table-striped }
+
+
+| Name       | Scope    | Description         | Example          |    Type   |
+|------------|----------|---------------------|------------------|-----------|
+| `dmxid`    | required | Placement Id        |  100001          | `integer` |
+| `memberid` | required | Account id          |  100003          | `integer` |
+
+=======
+
+##### Prebid 0.34~ legacy
 
 {: .table .table-bordered .table-striped }
-| Name       | Scope    | Description | Example | Type     |
-|------------|----------|-------------|---------|----------|
-| `id`       | required |             |         | `string` |
-| `floor`    | optional |             |         | `string` |
-| `revShare` | optional |             |         | `string` |
-| `currency` | optional |             |         | `string` |
+
+| Name       | Scope    | Description             | Example          | Type      |
+|------------|----------|-------------------------|------------------|-----------|
+| `id`       | required | Placement ID            | 123456789        | `integer` |
+| `floor`    | optional | Bid floor price         | "1.00"           | `string`  |
+| `revShare` | optional | Publisher Revenue Share | "0.85"           | `string`  |
+| `currency` | optional | Currency code           | "usd"            | `string`  |
+