added org.bitcoin.bitcoind.plist for launchd (OS X)

contrib/init/README.md

@@ -5,6 +5,7 @@ Upstart: bitcoind.conf
 OpenRC:  bitcoind.openrc
          bitcoind.openrcconf
 CentOS:  bitcoind.init
+OS X:    org.bitcoin.bitcoind.plist
 
 have been made available to assist packagers in creating node packages here.
 

contrib/init/org.bitcoin.bitcoind.plist

@@ -0,0 +1,15 @@
+<?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.bitcoin.bitcoind</string>
+	<key>ProgramArguments</key>
+	<array>
+		<string>/usr/local/bin/bitcoind</string>
+		<string>-daemon</string>
+	</array>
+	<key>RunAtLoad</key>
+	<true/>
+</dict>
+</plist>