Make alert work with the new graphite.py
add head replacement if missing in rule targets
fix small bug
add some log
Log rules with inexistant targets
fix stupid little error
Attempt some fixes in matching requested and returned target in mist.alert
Attempt some fixes 2
alert:Fix typo in get_data
alert: fix typo in load target
Add NoDataHandler to MultiHandler
Add _requested_target entry for alert to play
Fix issue with nodata alerts when whisper files are missing
alert: remove duplicate nodata log entry when whisper files are missing