My 2nd attempt to fix issue #1113 by adding EpicEditor as default wiki editor

Created by: namtzigla

Added EpicEditor as wiki pages editor

This are the screenshots: Edit mode: http://snag.gy/wIO3c.jpg Preview mode: http://snag.gy/NyqG3.jpg Final result: http://snag.gy/eKcmv.jpg