Removed unnecessary duplication of attributes containing data uris and fixed _scanForImages.
Removed unnecessary duplication of attributes containing data uris and fixed _scanForImages.

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