Assets: Convert to ogg

- Uses oggmented library to add ogg support to iOS
- Adds support for ogg songs on the server, configurable per song on the admin page
- Lets iOS users upload custom songs with gdrive when enabled
- Tweaked colour picker on account page to respond faster
- Fixed not being able to restart osu songs

templates/admin_song_new.html

@@ -74,13 +74,21 @@
         </div>
 
         <div class="form-field">
-            <p><label for="type">Type</label></p>
+            <p><label for="type">Chart type</label></p>
             <select name="type" id="type">
                 <option value="tja">TJA</option>
                 <option value="osu">osu!taiko</option>
             </select>
         </div>
 
+        <div class="form-field">
+            <p><label for="music_type">Music type</label></p>
+            <select name="music_type" id="music_type">
+                <option value="ogg">OGG</option>
+                <option value="mp3">MP3</option>
+            </select>
+        </div>
+
         <div class="form-field">
             <p><label for="offset">Offset</label></p>
             <input type="text" id="offset" value="0" name="offset" required>