percent-4xx-1m(-5m,-15m) metrics from metrics-jetty8 to metrics-jetty9
Merge pull request #713 from TheTweak/percent-metrics-jetty-9

percent-4xx-1m(-5m,-15m) metrics from metrics-jetty8 to metrics-jetty9
Add 4xx and 5xx ratio gauges to jetty9-legacy
Update project URL in POM
Fix logger name in DefaultObjectNameFactory
Fix typo in Slf4jReporter.Builder, fixes #717
Added 3rd party link to metrics-spark-reporter
Merge pull request #723 from ahars/master

Added 3rd party link to metrics-spark-reporter
Add InstrumentedExecutors utility class

InstrumentedExecutors contains factory and utility methods for InstrumentedExecutorService
InstrumentedScheduledExecutorService, and InstrumentedThreadFactory classes similar to the
java.util.concurrent.Executors class.
Merge pull request #728 from joschi/instrumented-executors

Add InstrumentedExecutors utility class
remove Error if reportError = false