Move rtaudio, alsa-playback and qxt into thirdparty/.

thirdparty/libportfwd/README

@@ -0,0 +1,29 @@
+libportfwd
+----------
+A basic, lightweight c++ wrapper around miniupnp and nat-pmp libraries
+for setting up port fwds, detecting max up/downstream bandwidth, and 
+finding out external IP address.
+
+See: http://miniupnp.free.fr/
+
+Designed to wrap up miniupnpc+natpmp libs into a static lib with a small API
+so other projects can easily setup port fwds without shipping extra libs/deps.
+
+Should detect any upnp or nat-pmp router and automatically use the appropriate
+library under the hood.
+
+Uses cmake to build needed bits of miniupnpc.
+
+NB/TODO
+-------
+I don't have a nat-pmp capable device (eg: Airport Express)
+so haven't implemented that bit yet. Only supports upnp atm.
+
+Usage
+-----
+See the demo in main.cpp, but here's the jist:
+
+ Portfwd pf;
+ pf.init(2000);   // 2000 = ms to wait for response from router
+ pf.add(1234);    // port to fwd to you
+ pf.remove(1234); // remove port fwding on exit