Added intensity property to GPUImageLookupFilter.m
Added intensity property to GPUImageLookupFilter.m

Defaults to 1.0f, values between 0.0f and 1.0f
agan112/GPUImage,Matzo/GPUImage,msfeldstein/GPUImage,RavishankarDuMCA10/GPUImage,hoanganhx86/GPUImage,tastyone/GPUImage,devluyy/GPUImage,mad102190/GPUImage,LIQC/GPUImage,tastyone/GPUImage,levyleo/LGPUImage,StratAguilar/GPUImage,zilaiyedaren/GPUImage,mervekeles/repo,TuSDK/GPUImage,drewwilson/GPUImage,Matzo/GPUImage,wysaid/GPUImage,headupinclouds/GPUImage,r3mus/GPUImage,yshiga/GPUImage,wangwei1237/GPUImage,Creolophus/GPUImage,thinkrad/GPUImage,sansuiso/GPUImage,kalsariyac/GPUImage,cookov/GPUImage,sprint84/GPUImage,cnbin/GPUImage,hakanw/GPUImage,mervekeles/repo,devluyy/GPUImage,jsharp83/GPUImage,SuPair/GPUImage,liduanw/GPUImage,alex-learn/GPUImage,AmiaoCat/GPUImage,pcKanso/GPUImage,SanjoDeundiak/GPUImage,AlanJN/GPUImage,TimorCan/GPUImage,AmiaoCat/GPUImage,csjlengxiang/GPUImage,BlessNeo/GPUImage,nickplee/GPUImage,rtsbtx/GPUImage,0x4d52/GPUImage,xingyuniu/GPUImage,sansuiso/GPUImage,hgl888/GPUImage,powerhome/GPUImage,IncredibleDucky/GPUImage,njucsyyh/GPUImage,KBvsMJ/GPUImage,SuPair/GPUImage,yshiga/GPUImage,DavidWangTM/GPUImage,rtsbtx/GPUImage,agan112/GPUImage,SanChain/GPUImage,sprint84/GPUImage,lily4ever/GPUImage,DavidWangTM/GPUImage,Matzo/GPUImage,zzhhui/GPUImage,jackeychens/GPUImage,TuSDK/GPUImage,ramoslin02/GPUImage,birthmark/GPUImage,sujeking/GPUImage,hanton/GPUImage,IncredibleDucky/GPUImage,rromanchuk/GPUImage,ashishgabani/GPUImage,wfxiang08/GPUImage,UltravisualApp/GPUImage,odyth/GPUImage,yimouleng/GPUImage,skonb/GPUImage,PodRepo/GPUImage,pevasquez/GPUImage,eighteight/GPUImage,java02014/GPUImage,YuAo/GPUImage,efremidze/GPUImage,yaoxiaoyong/GPUImage,silvansky/GPUImage,horaceho/GPUImage,njucsyyh/GPUImage,mumer92/GPUImage,powerhome/GPUImage,Kevin775263419/GPUImage,hakanw/GPUImage,nickplee/GPUImage,headupinclouds/GPUImage,odyth/GPUImage,denivip/GPUImage,loi32456/GPUImage,jackeychens/GPUImage,Creolophus/GPUImage,agan112/GPUImage,cnbin/GPUImage,hgl888/GPUImage,SanjoDeundiak/GPUImage,eunmin/GPUImage,SanChain/GPUImage,wysaid/GPUImage,thinkrad/GPUImage,njucsyyh/GPUImage,hgl888/GPUImage,ohad7/GPUImage,msfeldstein/GPUImage,smule/GPUImage,geowarsong/GPUImage,hanangellove/GPUImage,u-engine/GPUImage,TimorCan/GPUImage,937447974/GPUImage,loi32456/GPUImage,jackeychens/GPUImage,mingming1986/GPUImage,inb4ohnoes/GPUImage,zakinaeem/GPUImage,tastyone/GPUImage,levyleo/LGPUImage,haikusw/GPUImage,nickplee/GPUImage,nonoBruce/GPUImage,wjszf/GPUImage,headupinclouds/GPUImage,ashishgabani/GPUImage,lily4ever/GPUImage,StratAguilar/GPUImage,hanton/GPUImage,mattwymore/GPUImage,shi-yan/GPUImage,yimouleng/GPUImage,zakinaeem/GPUImage,j364960953/GPUImage,powerhome/GPUImage,zakinaeem/GPUImage,kalsariyac/GPUImage,BradLarson/GPUImage,drewwilson/GPUImage,eighteight/GPUImage,wjszf/GPUImage,mumer92/GPUImage,zhengfuzhe2013/GPUImage,dachaoisme/GPUImage,catbus/GPUImage,lydonchandra/GPUImage,KBvsMJ/GPUImage,xingyuniu/GPUImage,YuAo/GPUImage,zhengfuzhe2013/GPUImage,liduanw/GPUImage,duanhjlt/GPUImage,SanjoDeundiak/GPUImage,dawangjiaowolaixunshan/GPUImage,mtxs007/GPUImage,faceleg/GPUImage,zilaiyedaren/GPUImage,YuAo/GPUImage,wangwei1237/GPUImage,sansuiso/GPUImage,Slin/GPUImage,zzhhui/GPUImage,KBvsMJ/GPUImage,yaoxiaoyong/GPUImage,937447974/GPUImage,somegeekintn/GPUImage,u-engine/GPUImage,Kevin775263419/GPUImage,dachaoisme/GPUImage,howandhao/GPUImage,xingyuniu/GPUImage,java02014/GPUImage,DavidWangTM/GPUImage,BradLarson/GPUImage,Creolophus/GPUImage,gank0326/GPUImage,BlessNeo/GPUImage,Learn-IOS/GPUImage,gank0326/GPUImage,UndaApp/GPUImage,r3mus/GPUImage,wjszf/GPUImage,Learn-IOS/GPUImage,cookov/GPUImage,RavishankarDuMCA10/GPUImage,BlessNeo/GPUImage,bgulanowski/GPUImage,0x4d52/GPUImage,mattwymore/GPUImage,zhengfuzhe2013/GPUImage,pevasquez/GPUImage,ozetadev/GPUImage,sujeking/GPUImage,skonb/GPUImage,wysaid/GPUImage,hyperconnect/GPUImage,AlanJN/GPUImage,sdonly/GPUImage,haikusw/GPUImage,0x4d52/GPUImage,mingming1986/GPUImage,pengleelove/GPUImage,pengleelove/GPUImage,mad102190/GPUImage,bgulanowski/GPUImage,LIQC/GPUImage,smule/GPUImage,eighteight/GPUImage,IncredibleDucky/GPUImage,eunmin/GPUImage,lacyrhoades/GPUImage,horaceho/GPUImage,Slin/GPUImage,kalsariyac/GPUImage,skonb/GPUImage,xqz001/GPUImage,ohad7/GPUImage,AskaCai/GPUImage,hakanw/GPUImage,Lcarvajal/GPUImage,jakeva/GPUImage,faceleg/GPUImage,UltravisualApp/GPUImage,HSFGitHub/GPUImage,jsharp83/GPUImage,mervekeles/GPUImage,HSFGitHub/GPUImage,mumer92/GPUImage,BradLarson/GPUImage,jakeva/GPUImage,duanhjlt/GPUImage,birthmark/GPUImage,rtsbtx/GPUImage,UndaApp/GPUImage,howandhao/GPUImage,pengleelove/GPUImage,PodRepo/GPUImage,rromanchuk/GPUImage,AskaCai/GPUImage,u-engine/GPUImage,jianwoo/GPUImage,alex-learn/GPUImage,geowarsong/GPUImage,hanangellove/GPUImage,ohad7/GPUImage,drewwilson/GPUImage,SanChain/GPUImage,mervekeles/GPUImage,sdonly/GPUImage,rromanchuk/GPUImage,pcKanso/GPUImage,howandhao/GPUImage,ozetadev/GPUImage,inb4ohnoes/GPUImage,nonoBruce/GPUImage,somegeekintn/GPUImage,lydonchandra/GPUImage,csjlengxiang/GPUImage,odyth/GPUImage,gank0326/GPUImage,Lcarvajal/GPUImage,Slin/GPUImage,lacyrhoades/GPUImage,ramoslin02/GPUImage,mtxs007/GPUImage,shi-yan/GPUImage,PlanetaToBe/GPUImage,silvansky/GPUImage,hoanganhx86/GPUImage,j364960953/GPUImage,mad102190/GPUImage,wfxiang08/GPUImage,denivip/GPUImage,PlanetaToBe/GPUImage,jianwoo/GPUImage,hoanganhx86/GPUImage,dawangjiaowolaixunshan/GPUImage,Learn-IOS/GPUImage,xqz001/GPUImage,liduanw/GPUImage,jsharp83/GPUImage,hyperconnect/GPUImage,silvansky/GPUImage,sprint84/GPUImage,jianwoo/GPUImage,hanangellove/GPUImage,catbus/GPUImage,faceleg/GPUImage,efremidze/GPUImage,bgulanowski/GPUImage