Added release date to changelog.txt
Added release date to changelog.txt

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