Script based recording with Jivo

Recording with the Plextor ConvertX series of capture devices is the default
with Jivo, but it can be made to work with other devices if they provide 
command line functionality (such as the Hauppage PVR devices).  Recording is 
done through a call to a script which does the actual recording.  To configure
jivo to record the script requires editing the configuration:

	- edit etc/config/ca.reachable.tv.recorder.xml
	- remove contents of 
	    ca.reachable.tv.recorder.RecordServerImpl.recorderPlugins
	  and add
	    <value>ca.reachable.tv.recorder.plugin.ExecRecorderPlugin</value>

The exec recorder plugin calls the 'bin/rec' script to do the recording.  To 
alter the script that is called, another config change is required:

	- edit etc/config/ca.reachable.tv.recorder.plugin.xml
	- alter contents of 
	    ca.reachable.tv.recorder.plugin.ExecRecorderPlugin.recordCmd
	  to point at the recording script.  Command substitutions are
	  provided in the description

An untested hauppauge record script is provided in bin/rec.hauppauge