Added missing minified files from CKeditor Codemirror plugin, bump to 2.7.7

docs/history.rst

hooks/post_gen_project.py

...editor/ckeditor/plugins/codemirror/css/codemirror.min.css

...s/ckeditor/ckeditor/plugins/codemirror/js/beautify.min.js

...r/ckeditor/plugins/codemirror/js/codemirror.addons.min.js

...tor/plugins/codemirror/js/codemirror.addons.search.min.js

...ckeditor/ckeditor/plugins/codemirror/js/codemirror.min.js

...ditor/plugins/codemirror/js/codemirror.mode.bbcode.min.js

.../plugins/codemirror/js/codemirror.mode.bbcodemixed.min.js

...or/plugins/codemirror/js/codemirror.mode.htmlmixed.min.js

...r/plugins/codemirror/js/codemirror.mode.javascript.min.js

...ckeditor/plugins/codemirror/js/codemirror.mode.php.min.js

...keditor/plugins/codemirror/js/codemirror.mode.twig.min.js