add a config for mac's LaunchAgents with instructions in README

README

@@ -64,4 +64,12 @@ How to compile and install on Mac OSX 10.6
 * perl shairport.pl
 
 OSX 10.5 only bundles perl 5.8, which won't work with shairport. After getting a update
-here (http://www.perl.org/get.html), it worked.
+here (http://www.perl.org/get.html), it worked.
+
+How to run as a daemon on Mac
+------
+* cp hairtunes shairport.pl /usr/local/bin
+* vi /usr/loca/bin/shairport.pl, change the path of hairtunes from ./hairtunes to /usr/loca/bin/hairtunes
+* cp org.mafipulation.shairport.plist ~/Library/LaunchAgents/
+* launchctl load org.mafipulation.shairport
+* launchctl start org.mafipulation.shairport

org.mafipulation.shairport.plist

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>Label</key>
+    <string>org.mafipulation.shairport</string>
+    <key>RunAtLoad</key>
+    <true/>
+    <key>ProgramArguments</key>
+    <array>
+        <string>/usr/local/bin/shairport.pl</string>
+    </array>
+</dict>
+</plist>