Removed references to cmsplugin_blog
Simplified session_language context_processor.
Updated the multilingual_project_blog_tags.

* Changed queries and templates, that should now work for multilingual-news
  instead of cmsplugin_blog
* Removed some obsolete tags
* Added get_translation tags to get specific hvad translation of an object
Updated urls.
Updated document_library templates.

* removed cmsplugin_blog_tags and simple_translation_tags
* accessing translated fields hvad style
* changed placeholder syntax
Changed good_practice_examples templates

* removed cmsplugin_blog_tags and simple_translation_tags
* accessing translated fields hvad style
* changed placeholder syntax
Updated multilingual_events templates.

* removed cmsplugin_blog_tags and simple_translation_tags
* accessing translated fields hvad style
* changed placeholder syntax
Updated multilingual_news templates

* adopted old templates from cmsplugin_blog and updated them to match
  multilingual_news
* removed cmsplugin_blog_tags and simple_translation_tags
* accessing translated fields hvad style
* changed placeholder syntax
* updated rss urls
* added conditional rendering of excerpt in news detail preview, so one can
  update the plugins via front end editing
Updated other app's templates.

-> django-multilingual-initiatives, django-multilingual-orgs, django-people

* removed cmsplugin_blog_tags and simple_translation_tags
* accessing translated fields hvad style
* changed placeholder syntax
Removed SESSION_LANGUAGE from menu and language_chooser.
Removed tabs and added cms toolbar on project_base template.
Removed cmsplugin_blog_tags from home_base cms template
Updated settings.
Removed cmsplugin_blog settings and added multilingual_tags to installed apps
Removed simple_translation from CustomSliderItemAdminForm
Removed simple_translation from more templates and removed some tabs.