Change `--java-script` to just `--script`

This should be specific enough in this context and is more consistent with
`--script-settings`.

README.md

@@ -346,7 +346,7 @@ Here are some Bash examples which illustrate getting and setting tag information
 
 * Sets fields by running a script to compute changes dynamically:
   ```
-  tageditor set --pedantic debug --java-script path/to/script.js -f foo.mp3
+  tageditor set --pedantic debug --script path/to/script.js -f foo.mp3
   ```
 
     - This feature is still experimental. The script API is still subject to change.

application/main.cpp

@@ -85,8 +85,8 @@ SetTagInfoArgs::SetTagInfoArgs(Argument &filesArg, Argument &verboseArg, Argumen
     , preserveModificationTimeArg("preserve-modification-time", '\0', "preserves the file's modification time")
     , preserveMuxingAppArg("preserve-muxing-app", '\0', "preserves the file's muxing app meta-data value")
     , preserveWritingAppArg("preserve-writing-app", '\0', "preserves the file's writing app meta-data value")
-    , jsArg("java-script", 'j', "modifies tag fields via the specified JavaScript", { "path" })
-    , jsSettingsArg("script-settings", '\0', "passes settings to the JavaScript specified via --java-script", { "key=value" })
+    , jsArg("script", 'j', "modifies tag fields via the specified JavaScript", { "path" })
+    , jsSettingsArg("script-settings", '\0', "passes settings to the JavaScript specified via --script", { "key=value" })
     , setTagInfoArg("set", 's', "sets the specified tag information and attachments")
 {
     docTitleArg.setRequiredValueCount(Argument::varValueCount);