Merge tag '2.0.4' into develop

2.0.4
Better number extractor
New version of parsedown and parsedown extra, fixing new line bug
Merge branch 'master' of https://github.com/timkley/kirby into timkley-master
Merge branch 'timkley-master' into develop
New toolkit version
Readded content.file.ignore option
New Parsedown Extra version
Fixed popup attribute for the image tag
More secure way of handling multi-environment setups
New toolkit version
New toolkit version
Whitelisting for allowed config files
New toolkit version with better safeName handling on uploads
All main domains are now being autodetected with SERVER_NAME instead of HTTP_HOST
Fixed isOpen for multi-language pages with URL-Key
page::title now always returns a field object
Template data can now be set in a plugin
Improved Field class
Fixed field problem in kirbytext