Rewrite for summerbreak

[x] update to Laravel 5.4
[x] write tests for default included elements
[x] update admin theme
- [x] update to latest version
- [x] reflect the improved design from arterin admin
- [ ] reduce noise by isolating item settings from its content
[x] update redactor to newest version 2.0 (this includes toolbar icons)
[x] provide testenvironment for project implementations
[x] update readme with basic setup and out-of-the-box usage
[x] set generic articles model as example
- [x] article should be publishable
- [ ] article should be versioned
[x] proper roles and permissions. This could be combined with an activity logger
[x] proper solution for media and user manipulation of images (crop and resize). This could be the slim cropper
[ ] proper solution for list sorting
[x] implement password reset
[ ] implement admin GA dashboard
[ ] introduce css comb into the frontend build process

thinktomorrow / chief