Merge tag 'v1.0.1'

v1.0.1
statsd: negative gauges require special handling

They are normally accumulated with last value, so the last value
must be set to zero.
Merge pull request #6 from strongloop/feature/fix-negative-gauges

statsd: negative gauges require special handling
v1.0.2
Merge branch 'release/1.0.2' into production