BigSuds - bigsuds.ConnectionError: BadStatusLine: ''

Hey gang,

I've created a temporary branch if you want to test:

https://github.com/mhite/graphite-collectors/tree/connection_error

This just implements some retry logic when a bigsuds Connecti or BadStatusLine from httplib exception is raised. It's not perfect (ie. if you have bad credentials, it will retry since it's the same exception) but I want to see if we can smooth over whatever problem the F5 is having with a simple retry.