Implement XDG compliance, logging, and improved 401 error handling

- Install to ~/.local/bin/winamp-mpris
- Use ~/.local/state/winamp-mpris/bridge.log for logging
- Use $XDG_RUNTIME_DIR/winamp-mpris.pid for PID management
- Add detailed user notification for 401 Unauthorized errors
- Add install.sh for automated, standard-compliant setup
- Include Winamp Web Interface source code and installer in repository

Wawi Source/Operations.txt

@@ -0,0 +1,51 @@
+Winamp Control
+
+/play[?nnn]			Plays current track if no argument is given, or plays
+					the track at playlist position nnn. Also resumes playback
+					if Winamp is paused.
+/prev				Previous Track
+/next				Next Track
+/pause				Pause / Resume
+/stop				Stop
+/stopslow			Stops with fadeout
+/vol?nn				Sets the volume. <nn> is a number between 0 and 10 where
+					0 is mute and 10 is full volume.
+
+Playlist control
+
+/clear				Clears playlist
+/url?l&<url>		Loads a HTTP location at <url> into the playlist
+/url?p&<url>		Loads a HTTP location at <url> into the playlist and plays it.
+/sct?xxxxxxxxx.url	Loads a URL shortcut file
+
+
+Other pages
+
+/list				Returns current playlist
+/img?nnn			Image number nnn
+/top				Graphic link bar
+/browse?\path\		Browse music collection at "%mp3_root_dir%\path\"
+/about				Returns a little 'about' page
+/main				Main page, with title and current track information
+
+
+Unlinked
+
+/smalltitle			Returns the artist and title of the playing track. No HTML
+					formatting; just the HTTP header and a line of text.
+/title				Returns a HTML page of the track information - artist, title,
+					state of playback (playing, paused, stopped), track time.
+					Automatically refreshes.
+/login				Brings up a username & password box every time; can be used
+					to log out.
+
+
+Still in development - they might work, they might not...
+
+/shutdown			Turns off the computer
+/dl?\path\file		Download a file at "%mp3_root_dir%\path\file"
+
+
+Anything else returns the frameset to load the top link bar and the main page.
+
+