Change client to player (#206)

* Change client to player

* Change client player to client

For consistency, to address @cconcolato review comment.

Closes #202.

index.html

@@ -264,7 +264,7 @@ <h3>Transcripts and Scripts</h3>
           Then there is a stage in which an audio rendering of the <a>script</a> is generated,
           for eventual mixing into the programme audio.
           That mixing can occur prior to distribution,
-          or in the client directly.</p>
+          or in the player directly.</p>
         <section>
           <h4>Dubbing <a>scripts</a></h4>
           <p>The <dfn>dubbing</dfn> process which consists in creating a <a>dubbing script</a>
@@ -316,7 +316,7 @@ <h4>Audio Description <a>scripts</a></h4>
             <li>defining mixing instructions (applied using [[TTML2]] audio styling) for combining the audio with the programme audio.</li>
           </ul> 
           <p>The audio mixing can occur prior to distribution of the media,
-            or in the client player.
+            or in the client.
             If the <a>audio description</a> <a>script</a> is delivered to the player,
             the text can be used to provide an alternative rendering,
             for example on a Braille display,