fix features/profile_photos.feature:17 I broke
fix opacity of control icons
Merge pull request #4414 from svbergerem/always-show-control-icons

Fix opacity of control icons
Do not leak photos in the profile sidebar
Valid meta elements, add pod personalization
Merge pull request #4356 from Flaburgan/valid-meta-elements

Valid meta elements, add pod personalization
profile message and mention icons
Merge pull request #4374 from svbergerem/profile-message-and-mention-icons

Tidy up profile sidebar
Add header to the single post view
Add images, fix layout rendering
improve design
add missing sprite file
Add hacky bootstrap header fix for single post view.
Implement new single post view.
Questionable css for the new single post view.
Switch to new single post view.
Fix specs for new single post view.
Visual changes to the spv.
improve new SPV

* Hopefully fix OEmbed view
* Fix OpenGraph view
* Fix middle border
* Add spacing at the bottom
* Fix comment styles by not including old SPV styles for them (TODO: maybe rescue some stuff there, like the code tag styling)
* Fix avatar size for default avatar
* Remove border below comment pane
* Fix overflow of post body with a lot of text
* Fix stylesheet inclusion
Import mixins.