Updated changelog.txt.
Updated changelog.txt.

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