LUN-1507 : Add style to blog entry
Merge remote-tracking branch 'origin/master' into LUN-1507

Conflicts:
	cms_blogger/models.py
LUN-1507 : Add blog post styles
Draft Entries should cannot be published from changelist view.
Pub dates for entries published from changelist are now reset.
Changed bottom buttons on entry change form.
LUN-1507 : Style header and handle social sharing
Merge branch 'master' into LUN-1507

Conflicts:
	cms_blogger/models.py
	cms_blogger/templates/cms_blogger/blog_header.html
	cms_blogger/templates/cms_blogger/entry_bottom.html
	cms_blogger/templates/cms_blogger/entry_summary.html
	cms_blogger/templates/cms_blogger/entry_top.html
Remove unnecessary context updates + some junk remaining code;
Cms page_attribute tag now works when rendering titles from layout pages
LUN-1507 : fix entry footer
LUN-1507 : Change namespace to 'cms-blogger'
Merge pull request #2 from laurafeier/LUN-1507

front-end design implementation
Added inner collapsible fieldsets support.
Changed datetimepicker widgets for start/end publication date.
Some datetimepicker styling for entry form.
merge with master