addition of a retryingest plugin (small mod of ppettit work) and the small modification to the mhhttpclient to make it function. if the mp is failed it will attempt to reingest checking if exists on server
	new file:   galicaster/plugins/retryingest.py
	modified:   galicaster/utils/mhhttpclient.py
changes to retryingest plugin to stop checks when recording or scheduled
	modified:   galicaster/plugins/retryingest.py
ammended copyright message