README: Mention support for the "legal" inquiries

Author: amotl

README.md

@@ -64,6 +64,7 @@ Currently the Client knows how to issue request for the following services:
 | ----------------------------------------------------------------------------- | --------------------- | --------- |
 | `family(reference_type, input, endpoint=None, constituents=None)`             | family                | inpadoc   |
 | `image(path, range=1, extension='tiff')`                                      | published-data/images | images    |
+| `legal(reference_type, input)`                                                | legal                 | other     |
 | `number(reference_type, input, output_format)`                                | number-service        | other     |
 | `published_data(reference_type, input, endpoint='biblio', constituents=None)` | published-data        | retrieval |
 | `published_data_search(cql, range_begin=1, range_end=25, constituents=None)`  | published-data/search | search    |