readme: make logo link to website
readme: make logo link to website

Just was linked to your project by someone, looks awesome!

I tried to get to the website at the top of the readme by clicking the image, and it didn't work.  This fixes that.
hckhanh/gulp,JsAaron/gulp,flackend/gulp,wbinnssmith/gulp,MarcBT/gulp,gavioto/gulp,VANITAX/gulp,pdg6805/gulp,jmm/gulp,soliury/gulp,borellaster/gulp,JimiHFord/gulp,caseytrombley/gulp,geltoncruz/gulp,cgvarela/gulp,XiaoLongW/gulp,lanbin/gulp,JsAaron/gulp,es128/gulp,MichaelFBA/gulp,mad-aran/gulp,BogusCurry/gulp,donglegend/gulp,ankita-kumari/gulp,thejameskyle/gulp,Coaxial/gulp,codeclimate-demo/gulp,appleboy/gulp,eaglesjava/gulp,SimenB/gulp,r14r/fork_javascript_gulp,klausbayrhammer/gulp,soliury/gulp,hckhanh/gulp,mariuszskon/gulp,songshuang00/gulp,iSC-Labs/gulp,huzion/gulp,preco21/gulp,wjb12/gulp,moander/gulp,iSC-Labs/gulp,maxhollmann/gulp,doginthehat/gulp,xuxinpie/gulp,AleksueiR/gulp,wjb12/gulp,IrvBriscoe/gulp,sonjudan/gulp,es128/gulp,brilliun/gulp,yugle7/gulp,pdehaan/gulp,borellaster/gulp,GoodBoyDigital/gulp,AtChina/gulp,frankwallis/gulp,cgvarela/slush,mikehaas763/gulp,AlexKomrakov/gulp,flackend/gulp,jonsterling/gulp,AleksueiR/gulp,minodisk/gulp,cgvarela/slush,PNW3DEV/gulp,michaelgena/gulp,bobintornado/gulp,tuzilingdang/gulp,prashant-andani/gulp,irenekay/Gulpjs-Webtest,geltoncruz/gulp,cgourlay/gulp,Teino1978-Corp/Teino1978-Corp-gulp,stevemao/gulp,jhsu/gulp,eaglesjava/gulp,zongkelong/gulp,yonglehou/gulp,edisplay/gulp,michaelgena/gulp,Rorchach/gulp,nmccready/gulp,zensh/gulp,youprofit/gulp,IrvBriscoe/gulp,liangzhien/gulp,moander/gulp,VANITAX/gulp,callumacrae/gulp,vineethawal/gulp,crspiccin/gulp,AtChina/gulp,tfennelly/gulp,jaeh/gulp,stoeffel/gulp,Coaxial/gulp,imjerrybao/gulp,bORm/gulp,zongkelong/gulp,sonjudan/gulp,snidima/gulp,pdehaan/gulp,mikehaas763/gulp,XiaoLongW/gulp,zpao/gulp,ybg555/gulp,kt3k/gulp,SimenB/gulp,GoodBoyDigital/gulp,chrismoulton/gulp,pdg6805/gulp,maxhollmann/gulp,frankwallis/gulp,klausbayrhammer/gulp,vineethawal/gulp,cgourlay/gulp,slushjs/slush,KillerDesigner/gulp,huzion/gulp,youprofit/gulp,tkvern/gulp,jaeh/gulp,yugle7/gulp,doginthehat/gulp,jhsu/gulp,r14r/fork_javascript_gulp,KillerDesigner/gulp,slushjs/slush,tuzilingdang/gulp,demohi/gulp,aaron-goshine/gulp,Zagorakiss/gulp,duanying0818/gulp,lcoder/gulp,xuxinpie/gulp,yochannah/gulp,sttk/gulp,AlexKomrakov/gulp,liangzhien/gulp,mariuszskon/gulp,jmm/gulp,pppp22591558/gulp,bmds/gulp,rlugojr/gulp,caseytrombley/gulp,chrismoulton/gulp,gulpjs/gulp,duanying0818/gulp,gavioto/gulp,anorthwolf/gulp,tkvern/gulp,PNW3DEV/gulp,yonglehou/gulp,Rorchach/gulp,tksander/gulp,callumacrae/gulp,preco21/gulp,songshuang00/gulp,aaron-goshine/gulp,fengjianjunstudy/gulp,pH200/jsrun,benweet/gulp,fengjianjunstudy/gulp,ruspython/gulp,breyed/gulp,tksander/gulp,pppp22591558/gulp,mohislm/gulp,stevemao/gulp,lanbin/gulp,tfennelly/gulp,anorthwolf/gulp,minodisk/gulp,seedtigo/gulp,bORm/gulp,crspiccin/gulp,Tiger66639/gulp,jonsterling/gulp,pH200/jsrun,ajwebb/gulp,foresthz/gulp,romario333/gulp,donglegend/gulp,ruspython/gulp,snidima/gulp,yochannah/gulp,thejameskyle/gulp,foresthz/gulp,edisplay/gulp,romario333/gulp,ybg555/gulp,Teino1978-Corp/Teino1978-Corp-gulp,lcoder/gulp,zpao/gulp,brilliun/gulp,Tiger66639/gulp,cgvarela/gulp,breyed/gulp,nmccready/gulp,codeclimate-demo/gulp,imjerrybao/gulp,mohislm/gulp,wbinnssmith/gulp,MichaelFBA/gulp,prashant-andani/gulp,silverbux/gulp,ancchaimongkon/gulp,BogusCurry/gulp,Zagorakiss/gulp,ged/gulp,seedtigo/gulp,bobintornado/gulp,JimiHFord/gulp,MarcBT/gulp,ancchaimongkon/gulp,zensh/gulp,ged/gulp,bevacqua/gulp,silverbux/gulp,mad-aran/gulp,benweet/gulp,bmds/gulp,ajwebb/gulp,midgethoen/gulp,ankita-kumari/gulp,midgethoen/gulp,rlugojr/gulp,gdi2290/gulp