remove ckeditor and mini_magick dependencies

removed ckeditor dependency from gemspec and from engine.rb
removed ckeditor generated file

removed ckeditor generated file, routes and migration
updated dummy/db/schema.rb
removed ckeditor init and commented ckeditor call

removed "//= require ckeditor/init" from simple_blog_admin.js
commented addCkeditor call for body and description. i will add it back
once i have the new ckeditor up and running
Merge pull request #8 from xskander/feature/remove_ckeditor

remove ckeditor