Added a texteditor using WYMeditor(MIT-license)

I have added wymeditor in our new blogpost TextArea. WYMeditor is Opensource MIT licensed tool for licensed tool for text editing. License agreement can be found here: http://files.wymeditor.org/wymeditor-1.0.0b2/MIT-license.txt

To make this done I had to change the blog content escape free because WYMeditor provides unescaped content.