AI2787: implement tinymce etherpadlite plugin
Merge branch 'AI2787' of https://github.com/dtygel/noosfero-ecosol into ai2787
Merge branch 'ai2787' into cirandas

Conflicts:
	app/models/environment.rb
	public/javascripts/tinymce/jscripts/tiny_mce/plugins/etherpadlite/editor_plugin.js
	public/javascripts/tinymce/jscripts/tiny_mce/plugins/etherpadlite/editor_plugin_src.js