Add command argument string splitting

launchd uses exec() under the hood when you specify ProgramArguments
or Program so you must break apart program arguments into separate
strings in an array or the command will fail

data/export/launchd/launchd.plist.erb

@@ -13,7 +13,9 @@
     </dict>
     <key>ProgramArguments</key>
     <array>
-        <string><%= process.command %></string>
+    <%- command_args.each do |command| -%>
+        <string><%= command %></string>
+    <%- end -%>
     </array>
     <key>KeepAlive</key>
     <true/>