Ignore signals on windows (not supported yet)
Ignore signals on windows (not supported yet)

Windows doesn't support signals yet:
https://github.com/joyent/node/issues/1553

[changelog]
pedrotcaraujo/karma,hexelon/karma,chrisirhc/karma,shakyShane/karma,maksimr/karma,divdavem/testacular,viruschidai/karma,brianmhunt/karma,swayf/karma,jacopotarantino/karma,jbdeboer/karma,Dignifiedquire/karma,buley/karma,hleeldc/karma,vojtajina/karma,codedogfish/karma,sylvain-hamel/karma,youprofit/karma,hitesh97/karma,peteryates/karma,drkibitz/karma,markoa/karma,Klaudit/karma,simudream/karma,kjbekkelund/karma,mccalltd/karma,panrafal/karma,chrisirhc/karma,remy/karma,IsaacChapman/karma,dmitriiabramov/karma,chhsiao1981/testacular,karma-runner/karma,david-garcia-nete/karma,rageshkrishna/karma,Basemm/karma,robdodson/karma,jamestalmage/karma,iammerrick/karma,sergeylukin/karma,marthinus-engelbrecht/karma,jacopotarantino/karma,sylvain-hamel/karma,hitesh97/karma,WickyNilliams/karma,vsdev1/testacular,cironunes/karma,viruschidai/karma,yandex-lego/karma,behzad88/karma,kahwee/karma,igorlima/karma,ernsheong/karma,joakimkarlsson/karma,hleeldc/karma,featurist/testacular,xdissent/karma,timebackzhou/karma,marcenuc/testacular,fivetanley/karma,bertrandgressier/karma,kahwee/karma,muffs/karma,harme199497/karma,makeusabrew/karma,ijobling/karma,jfroom/karma,mprobst/karma,hrgdavor/testacular,timebackzhou/karma,KidkArolis/karma,patrickporto/karma,buley/karma,vojtajina/karma,sublimino/karma,dmitriiabramov/karma,eddiemonge/karma,ryanflorence/testacular,unional/karma,jankopriva/karma,pmq20/karma,IveWong/karma,sym3tri/testacular,MiCHiLU/testacular,nishp1/testacular,clbond/karma,stevemao/karma,KevinOrtman/testacular,r3mi/karma,stevemao/karma,wesleycho/karma,kahwee/karma,Sanjo/karma,jjoos/karma,hppycoder/karma,ck1125/karma,shyamseshadri/testacular,IsaacChapman/karma,muffs/karma,eddiemonge/karma,jankopriva/karma,mpj/testacular,ahaurw01/testacular,andersjanmyr/karma,gayancliyanage/karma,OniOni/karma,taichi/testacular,jamesshore/testacular,oyiptong/karma,matti/karma,rageshkrishna/karma,xiaoking/karma,rageshkrishna/karma,revolunet/karma,hitesh97/karma,bertrandgressier/karma,codedogfish/karma,johnjbarton/karma,clbond/karma,Basemm/karma,buley/karma,unional/karma,iammerrick/karma,e-conomic/testacular,ashaffer/karma,peteryates/karma,NimaVaziri/karma,wesleycho/karma,MiCHiLU/testacular,mpj/testacular,mprobst/karma,gayancliyanage/karma,vsdev1/testacular,jan-molak/karma,Grummle/karma,thomasboyt/karma,ernsheong/karma,Dignifiedquire/karma,brenoc/karma,SamuelMarks/karma,jmendiara/karma,david-garcia-nete/karma,davidmichaelkarr/karma,jjoos/karma,astorije/karma,lencioni/karma,jeffjewiss/karma,KrekkieD/karma,behzad88/karma,dscape/testacular,r3mi/karma,dotfold/testacular,jfroom/karma,rgaskill/karma,sja/karma,jmendiara/karma,joakimkarlsson/karma,agrublev/karma,marthinus-engelbrecht/karma,IsaacChapman/karma,machuga/karma,harme199497/karma,lencioni/karma,powerkid/karma,davidmichaelkarr/karma,youprofit/karma,aiboy/karma,oyiptong/karma,revolunet/karma,powerkid/karma,chrisirhc/karma,hindsightsoftware/karma,nmalaguti/karma,shirish87/karma,rhlass/karma,Grummle/karma,IveWong/karma,Klaudit/karma,igorlima/karma,yiwang/testacular,patrickporto/karma,wilkerlucio/karma,johnjbarton/karma,fredsa/testacular,yiwang/testacular,Sanjo/karma,divdavem/testacular,makeusabrew/karma,clbond/karma,xiaoking/karma,ryankask/testacular,marthinus-engelbrecht/karma,chrisirhc/karma,johan/karma,zheller/karma,pedrosnk/karma,tschaub/karma,harme199497/karma,karma-runner/karma,KrekkieD/karma,lgalfaso/karma,unional/karma,dmitriiabramov/karma,ajoslin/karma,fredrikbonander/karma,xiaoking/karma,karma-runner/karma,rgaskill/karma,switchfly/karma,jeffjewiss/karma,switchfly/karma,fredsa/testacular,WickyNilliams/karma,youprofit/karma,xdissent/karma,gayancliyanage/karma,geddski/karma,gdi2290/karma,KrekkieD/karma,shirish87/karma,vtsvang/karma,Dignifiedquire/karma,gayancliyanage/karma,zheller/karma,KidkArolis/karma,hppycoder/karma,IveWong/karma,dotfold/testacular,Demeterr/karma,ryankask/testacular,wesleycho/karma,garcimouche/karma,sergeylukin/karma,pavelgj/testacular,lencioni/karma,ashaffer/karma,tomkuk/karma,growlybear/karma,tomkuk/karma,oyiptong/karma,jamestalmage/karma,gfxmonk/karma,Sanjo/karma,timebackzhou/karma,marthinus-engelbrecht/karma,harme199497/karma,timols/karma,swayf/karma,shirish87/karma,hrgdavor/testacular,growlybear/karma,skycocker/karma,rhlass/karma,panrafal/karma,aiboy/karma,thirtyseven/karma,czchen/karma,jamesshore/testacular,ashtuchkin/testacular,Sanjo/karma,yandex-lego/karma,hitesh97/karma,gdi2290/karma,MiCHiLU/testacular,adamnation/karma,youprofit/karma,czchen/karma,maksimr/karma,alextucker/testacular,SamuelMarks/karma,nmalaguti/karma,tomkuk/karma,patrickporto/karma,brenoc/karma,geddski/karma,jamestalmage/karma,astorije/karma,agrublev/karma,alextucker/testacular,remy/karma,simudream/karma,ajoslin/karma,bitwiseman/karma,pedrosnk/karma,codedogfish/karma,ashtuchkin/testacular,lgalfaso/karma,timebackzhou/karma,andersjanmyr/karma,simudream/karma,dannycroft/karma,alextucker/testacular,mccalltd/karma,pedrotcaraujo/karma,amagee/karma,marcodejongh/karma,rhlass/karma,behzad88/karma,aiboy/karma,NimaVaziri/karma,Klaudit/karma,skycocker/karma,jan-molak/karma,hindsightsoftware/karma,astorije/karma,mprobst/karma,powerkid/karma,ernsheong/karma,marcodejongh/karma,stevemao/karma,toranb/karma,sublimino/karma,ijobling/karma,ahaurw01/testacular,fredrikbonander/karma,sym3tri/testacular,dannycroft/karma,ck1125/karma,rgaskill/karma,garcimouche/karma,rylnd/karma,unional/karma,growlybear/karma,codedogfish/karma,pmq20/karma,panrafal/karma,kjbekkelund/karma,petebacondarwin/testacular,KrekkieD/karma,amagee/karma,Demeterr/karma,wesleycho/karma,nmalaguti/karma,johnjbarton/karma,patrickporto/karma,jamestalmage/karma,brianmhunt/karma,chad-configit/testacular,rhlass/karma,pedrotcaraujo/karma,thirtyseven/karma,stevemao/karma,skycocker/karma,johnjbarton/karma,dscape/testacular,bitwiseman/karma,Iristyle/karma,KevinOrtman/testacular,machuga/karma,kmayer/testacular,jsdir/karma,adamnation/karma,drkibitz/karma,jsdir/karma,brianmhunt/karma,OniOni/karma,karma-runner/karma,powerkid/karma,jeffjewiss/karma,jsdir/karma,astorije/karma,ahaurw01/testacular,chad-configit/testacular,johan/karma,tschaub/karma,adamnation/karma,pavelgj/testacular,fivetanley/karma,IsaacChapman/karma,pedrotcaraujo/karma,brianmhunt/karma,toranb/karma,pmq20/karma,IveWong/karma,sylvain-hamel/karma,timols/karma,ryanflorence/testacular,chhsiao1981/testacular,e-conomic/testacular,Dignifiedquire/karma,ashtuchkin/testacular,clbond/karma,matti/karma,markoa/karma,robdodson/karma,skycocker/karma,vtsvang/karma,kmayer/testacular,vtsvang/karma,vojtajina/karma,ijobling/karma,marcenuc/testacular,simudream/karma,sym3tri/testacular,gfxmonk/karma,pedrosnk/karma,jjoos/karma,rylnd/karma,featurist/testacular,buley/karma,xiaoking/karma,Klaudit/karma,jbdeboer/karma,kahwee/karma,tomkuk/karma,divdavem/testacular,wilkerlucio/karma,sja/karma,shakyShane/karma,david-garcia-nete/karma,bitwiseman/karma,pmq20/karma,hexelon/karma,nmalaguti/karma,maksimr/karma,yandex-lego/karma,vtsvang/karma,cironunes/karma,mpj/testacular,jjoos/karma,oyiptong/karma,SamuelMarks/karma,aiboy/karma,thomasboyt/karma