Better name for `to float` method.
Clean up unix system check code.
Remove bare except handlers in system/unix
Refactor disk check into understandable code.
Optionally filter devices from disk stats.
Run disk parsing checks on every os.
Don't filter by default in disk test harness.
Only run disk collection on the unix platform.
Make the parse df function fit on a screen.
Filter devices from iostats.
Adding missing re import to config.
Adding configuration example for device limiting regex.
Consolidate network metrics submission code.

This will make it much easier to filter device names.
Show checks.d syntax errors in info cmd.
Optionally filter network interfaces.
Merge pull request #615 from DataDog/limit-devices

Filter disk, io & network metrics by device
Don't fail gunicorn check if psutil can't be imported.
Merge branch 'gunicorn'
Update sqlserver.py to default to integrated security if no username/password
Updating sqlserver.yaml.example with explanation of new behavior