Fixing double quotes for postgres. Fixes #874.
Removed CSS statements that are no longer needed.
Use some CSS-hackery to replace the (sf) logo in the toolbar with a Bolt nut. Fixes #833

This isn’t the cleanest possible solution, but it _does_ prevent us
from changing any of the Symfony files in /vendor/.
Set the background to transparent for the collapsed toolbar.
Fix the 'The slug '%slug%' is used in more than one contenttype' notice. Working on #823.
Allow listing pages for contenttypes where slug == singular_slug. Working on #823.
Slightly refactoring 'return to overview', to make it simpler, and don't return to pages that are not overviews to begin with..

/cc @jadwigo
Merge pull request #881 from ntomka/master

fix a typo in hungarian translation
Fixes the image inclusion
Merge pull request #884 from terwey/patch-1

Fixes the image inclusion
Adds reference to the Swiftmailer documentation
Merge pull request #886 from terwey/patch-1

Adds reference to the Swiftmailer documentation
Added options parameter to twig API in BaseExtension
Merge pull request #888 from Dragony/master

Added options parameter to twig API in BaseExtension
Change 'held' to 'niet gepubliceerd' for dutch.
Adds a from_name and from_email to the SimpleForms config, also updates the global config.yml.dist to reflect the correct SwiftMailer docs
Merge pull request #889 from terwey/Email_fixes

Email fixes