Fix typo in readme.md and try to improve the contributer info
Fix typo in readme.md and try to improve the contributer info

Signed-off-by: Stefan Weil <8d4c780fcfdc41841e5070f4c43da8958ba6aec0@weilnetz.de>

ikuchmin/tinymce,jashua212/tinymce,TeamupCom/tinymce,aduth/tinymce,fillabs/TinySpecMCE,jashua212/tinymce,danielpunkass/tinymce,henrythewasp/tinymce,adaptiffdesigns/tinymce,danielpunkass/tinymce,ETSI-CTI/TinySpecMCE,leofeyer/tinymce,rednose-public/tinymce,tinymce/tinymce,FernCreek/tinymce,ETSI-CTI/TinySpecMCE,1099511627776/tinymce,blakewallan/tinymce,rbecheras/tinymce,sjbufton/tinymce,FernCreek/tinymce,MediehusetTek/tinymce,MediehusetTek/tinymce,gencer/tinymce,leofeyer/tinymce,blakewallan/tinymce,rednose-public/tinymce,gencer/tinymce,aduth/tinymce,sjbufton/tinymce,jtark/tinymce,tinymce/tinymce,rbecheras/tinymce,danielpunkass/tinymce,nbcp/tinymce,ikuchmin/tinymce,adaptiffdesigns/tinymce,1099511627776/tinymce,FernCreek/tinymce,jtark/tinymce,fillabs/TinySpecMCE,nbcp/tinymce,henrythewasp/tinymce,TeamupCom/tinymce,tinymce/tinymce