add docs (prebid#2394)

Author: Fawke

dev-docs/bidders/appnexus.md

@@ -42,6 +42,7 @@ All AppNexus placements included in a single call to `requestBids` must belong t
 | `member`            | optional | The member ID  from AppNexus. Must be used with `invCode`.                                                                                                                    | `'12345'`                                             | `string`         |
 | `invCode`           | optional | The inventory code from AppNexus. Must be used with `member`.                                                                                                                 | `'abc123'`                                            | `string`         |
 | `publisherId`       | optional | The publisher ID from AppNexus. It is used by the AppNexus end point to identify the publisher when `placementId` is not provided and `invCode` goes wrong. The `publisherId` parameter can be either a `string` or `integer` for Prebid.js, however `integer` is preferred.                                                                                                                    | `12345`                                             | `integer`         |
+| `frameworks`        | optional | Array of integers listing API frameworks for Banner supported by the publisher. | `integer` |
 | `user`              | optional | Object that specifies information about an external user. See [User Object](#appnexus-user-object) for details.                                                               | `user: { age: 25, gender: 0, dnt: true}`              | `object`         |
 | `allowSmallerSizes` | optional | If `true`, ads smaller than the values in your ad unit's `sizes` array will be allowed to serve. Defaults to `false`.                                                         | `true`                                                | `boolean`        |
 | `usePaymentRule`    | optional | If `true`, Appnexus will return net price to Prebid.js after publisher payment rules have been applied.                                                                       | `true`                                                | `boolean`        |
@@ -70,7 +71,7 @@ All AppNexus placements included in a single call to `requestBids` must belong t
 | `skippable` | Boolean which, if `true`, means the user can click a button to skip the video ad.  Defaults to `false`. | `boolean` |
 |`skipoffset`| Integer that defines the number of seconds until an ad can be skipped.  Assumes `skippable` setting was set to `true`. | `integer` |
 | `playback_method` | A string that sets the playback method supported by the publisher.  Allowed values: `"auto_play_sound_on"`; `"auto_play_sound_off"`; `"click_to_play"`; `"mouseover"`; `"auto_play_sound_unknown"`. | `string` |
-| `frameworks` | Array of integers listing API frameworks supported by the publisher.  Allowed values: None: `0`; VPAID 1.0: `1`; VPAID 2.0: `2`; MRAID 1.0: `3`; MRAID 2.0: `4`; ORMMA: `5`. | `Array<integer>` |
+| `frameworks` | Array of integers listing API frameworks supported by the publisher.  Allowed values: None: `0`; VPAID 1.0: `1`; VPAID 2.0: `2`; MRAID 1.0: `3`; MRAID 2.0: `4`; ORMMA: `5`; OMID 1.0 `6`. | `Array<integer>` |
 
 
 <a name="appnexus-user-object" />