Added lightbox support for rel attribute.
Added lightbox support for rel attribute.

simachewh/tinymce,rednose-public/tinymce,M4R7iNP/tinymce,collective/tinymce,ikuchmin/tinymce,howanghk/tinymce,toxalot/tinymce,4teamwork/tinymce,tinymce/tinymce,rxl194/tinymce,fashionsun/tinymce,Razzwan/tinymce,fillabs/TinySpecMCE,adaptiffdesigns/tinymce,shilpi230/tinymce,jashua212/tinymce,henrythewasp/tinymce,endjin/tinymce,enfold/tinymce,endjin/tinymce,nbcp/tinymce,4teamwork/tinymce,support-dot-com/tinymce,jashua212/tinymce,danchr/tinymce,ice8lue/tinymce,TeamupCom/tinymce,rbecheras/tinymce,MediehusetTek/tinymce,M4R7iNP/tinymce,ChristophKaser/tinymce,TeamupCom/tinymce,jtark/tinymce,howanghk/tinymce,FernCreek/tinymce,adaptiffdesigns/tinymce,aduth/tinymce,fhchina/tinymce,ChristophKaser/tinymce,nikolas/tinymce,rxl194/tinymce,sachgits/tinymce,jtark/tinymce,rednose-public/tinymce,ETSI-CTI/TinySpecMCE,simachewh/tinymce,Razzwan/tinymce,Zimbra/tinymce,bsuh/tinymce,MediehusetTek/tinymce,leofeyer/tinymce,sachgits/tinymce,widgetfactory/tinymce,shilpi230/tinymce,pmpl-5/tinymce,collective/tinymce,danielpunkass/tinymce,Kindling/tinymce,tinymce/tinymce,blakewallan/tinymce,FernCreek/tinymce,mplank/tinymce,nbcp/tinymce,VioletLife/tinymce,kencheung/tinymce,dziemian007/tinymce,toxalot/tinymce,enfold/tinymce,fashionsun/tinymce,dziemian007/tinymce,gabixdev/tinymce,henrythewasp/tinymce,gencer/tinymce,sjbufton/tinymce,Kindling/tinymce,mplank/tinymce,FernCreek/tinymce,danielpunkass/tinymce,1099511627776/tinymce,Shopify/tinymce,kencheung/tinymce,blakewallan/tinymce,bsuh/tinymce,support-dot-com/tinymce,leofeyer/tinymce,gencer/tinymce,widgetfactory/tinymce,pmpl-5/tinymce,ikuchmin/tinymce,cclaerhout/tinymce,nikolas/tinymce,tinymce/tinymce,cclaerhout/tinymce,fhchina/tinymce,Zimbra/tinymce,aduth/tinymce,VioletLife/tinymce,danchr/tinymce,ETSI-CTI/TinySpecMCE,1099511627776/tinymce,fillabs/TinySpecMCE,sjbufton/tinymce,danielpunkass/tinymce,rbecheras/tinymce,ice8lue/tinymce,gabixdev/tinymce