Add view to find all available metrics for a vm
Replace head with %s in find_metrics()
graphite.py: Clean up and refactor
remove cross graphs
Small changes in methods.py

to make compatible with the changes in grpahite.py
Fix disk and no-data series, other minor fixes
Make get_stats also accept custom graphite targets
Revert "Attempt to gracefully handle time skews"

This reverts commit f7f539187a7774f9b4fd5e04e2a27dd7098f660e.

Conflicts:
	src/mist/alert/alert.py
Make mist.alert compatible w graphite.py changes
alert.py: handle None's in datapoints
Make mist.alert work with custom metrics
Fix metric names inconsistencies 1
fix empty targets in get_stats
Fix typo in target summarization
Partial refactoring of graphite.py

Lots of changes and improvements.
Merge branch 'remove_collectd' into custom_metrics.refactored
Make alert work with the new graphite.py
add head replacement if missing in rule targets
fix small bug
add some log