Implements #1179

Resource: /index/{index_name}/crawler/web/patterns/status

Use the method GET to return the status

```json
{"successful":true,"details":{"exclusion_enabled":"true","inclusion_enabled":"true"}}
````

Use the method PUT and the query parameters "exclusion" and "inclusion" to set the status
/index/{index_name}/crawler/web/patterns/status?exclusion=false&inclusion=true