Update screenshots on readme (#1555)

* update screenshots on readme

.gitattributes

@@ -5,6 +5,7 @@
 *.jpeg  binary
 *.ico   binary
 *.icns  binary
+*.webp  binary
 *.eot   binary
 *.otf   binary
 *.ttf   binary

README.md

@@ -43,7 +43,7 @@ Rewrite of [Sonixd](https://github.com/jeffvli/sonixd).
 
 ## Screenshots
 
-<a href="https://raw.githubusercontent.com/jeffvli/feishin/development/media/preview_full_screen_player.png"><img src="https://raw.githubusercontent.com/jeffvli/feishin/development/media/preview_full_screen_player.png" width="49.5%"/></a> <a href="https://raw.githubusercontent.com/jeffvli/feishin/development/media/preview_album_artist_detail.png"><img src="https://raw.githubusercontent.com/jeffvli/feishin/development/media/preview_album_artist_detail.png" width="49.5%"/></a> <a href="https://raw.githubusercontent.com/jeffvli/feishin/development/media/preview_album_detail.png"><img src="https://raw.githubusercontent.com/jeffvli/feishin/development/media/preview_album_detail.png" width="49.5%"/></a> <a href="https://raw.githubusercontent.com/jeffvli/feishin/development/media/preview_smart_playlist.png"><img src="https://raw.githubusercontent.com/jeffvli/feishin/development/media/preview_smart_playlist.png" width="49.5%"/></a>
+<a href="./media/preview_full_screen_player.png"><img src="./media/preview_full_screen_player.png" width="49.5%"/></a> <a href="./media/preview_album_artist_detail.png"><img src="./media/preview_album_artist_detail.png" width="49.5%"/></a> <a href="./media/preview_album_detail.png"><img src="./media/preview_album_detail.png" width="49.5%"/></a> <a href="./media/preview_smart_playlist.png"><img src="./media/preview_smart_playlist.png" width="49.5%"/></a>
 
 ## Getting Started