Added image option that enables you to provide a custom image for split buttons.
Added image option that enables you to provide a custom image for split buttons.

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