Added @martel to the contributors list.
Added @martel to the contributors list.

thelastpickle/metrics,gorzell/metrics,jplock/metrics,mt0803/metrics,fcrepo4-archive/metrics,signalfx/metrics,randomstatistic/metrics,ohr/metrics,wickedshimmy/metrics-scala,mveitas/metrics,ChetnaChaudhari/metrics,dropwizard/metrics,mattnelson/metrics,scullxbones/metrics-scala,cirrus-dev/metrics,kevintvh/metrics,egymgmbh/metrics,valery1707/dropwizard-metrics,gburton1/metrics,gburton1/metrics,erikvanoosten/metrics-scala,infusionsoft/yammer-metrics,wfxiang08/metrics,mspiegel/metrics,ind9/metrics,timezra/metrics,fcrepo4-archive/metrics,tempredirect/metrics,chenxianghua2014/metrics,mnuessler/metrics,dropwizard/metrics,slovdahl/metrics,slachiewicz/metrics,jasw/metrics,mtakaki/metrics,infusionsoft/yammer-metrics,rexren/metrics,bentatham/metrics,AltitudeDigital/metrics,mveitas/metrics,unitsofmeasurement/metrics,maciej/metrics-scala,gorzell/metrics,dropwizard/metrics,Banno/metrics,gorzell/metrics