add javadoc to moveCard

wrapper/src/main/java/it/unisannio/ding/ids/wedroid/wrapper/api/CardService.java

@@ -79,6 +79,15 @@ public interface CardService {
     Call<Card> putCard(@Path("board") String boardID, @Path("list") String listID,
                        @Path("card") String cardID, @Body Card card);
 
+    /**
+     * Move a card from a list to an other
+     *
+     * @param boardID The id of the Board
+     * @param oldListID The id of the source list
+     * @param cardID The id of the card
+     * @param newListId The id of the destination list
+     * @return          The card with the matching ID
+     */
     @FormUrlEncoded
     @PUT("/api/boards/{board}/lists/{list}/cards/{card}")
     Call<Card> moveCard(