Modify Extensions::renderWidgetHolder method to render the widget data inside the placeholder and the additional html after it, but still inside the section tag.

So we can make widget areas in templates by calling them with the twig widget function, like: {{ widget( 'frontend', 'top_left' ) }}
We can define an extension's output to widget area like: $this->addWidget( 'frontend', 'top_left', 'widget', $additionalhtml, 3600 );
Expand tabs to spaces for better formatting.
Don't auto-update browscap.ini, since it takes long.
Bumping version number to match the package.sh version.
Make fancybox use the "default_image" sizes.
Removed floating from imageholder in mobile style to fix positioning & sizing bug on mobile devices.
Can ignore certain URLs in the sitemap
Remove the cache header from sitemap, like it's removed from all other requests
escape search output
Add maintenance mode as suggested in #278
Only use default  for TEXT fields in Sqlite since it requires the default (see #448). Don't use this for other platforms since it gives warnings and even errors. Fixes #470
Remove properties form phpdoc and make calls to them give a deprecated warning
Fixes #462