Updated changelog.txt with recent changes.
Updated changelog.txt with recent changes.

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