Added visualblocks.html to tests useful while developing.
Added visualblocks.html to tests useful while developing.

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