Handle DNS resolution error in graphite handler
DatabaseReplicationStats should only be for extended

Not everyone uses replication
Add stats for monitoring xid wraparound
fix #747

added a test as well. reviews of the test are welcom
Merge pull request #748 from m1keil/master

fix #747
Merge branch 'master' of github.com:python-diamond/Diamond
Merge pull request #18 from python-diamond/xid

Add stats for monitoring xid wraparound
Merge pull request #746 from pkittenis/graphite_dns_error

Handle DNS resolution error in graphite handler