this update is meant to be just a code styling and optimization.

* now you get a black square as default icon for circle sorting

* permissions bugfix

* now you can export all the interviews for a study, xlsx divided by name of interviewee
* bugfix permissions in various actions

set Vue into production mode.

* bugfix: when you upload an image and then use no image, now you get the mesort logo. Now the newotken modal is resetted everytime the token is saved.

* bugfix on duplicate study: when you duplicate and you have an interview with a created token, now it's not duplicated (caused errors)

* bugfix interview delete

* fixed a bug that when editing the study, the image wasn't saved
* fixed duration of created token messages
* created message on sorting creation

* you can now run mesort:install to install it into your server.

* bugfixed on token name: you can't insert / in the token name.

* % sign makes problem if it's used as password token to create a password.
Never encountered before in testing, first thing with a live user.

* enable florian to telescope

* when you invite someone to the study and they set the password, the email is verified automatically.

* enabled registration
* added email_verified_at to user table
* bugfixed look of notifications tab
* now users need to verify their email when they register

* now you can edit a duplicated study
* general optimization

* now get and show notifications only in homepage

* bugfix notification

* merged master branch to Production

* merged master branch to Production

* used laravel shift to start unit testing
* fixed notification bug on "send all"
* enabled the use of html in notifications
* set the max number of studies in the config file (15 by now)

* Controllers and Models are optimized
* Improved admin dashboard
* Now staff notification have a title
* Notification box improvments

* Optimized mail layout

* now you can duplicate study
on duplication the token file is keeped in the same directory and referenced in the db
* now exception view on model not found
* now you can create dummy studies
* new admin powers
* new logo without background

* started to program the duplicate study
* still need to duplicate each token and assign a new name to the file

* storage class imported in admin controller

* fixed a bug: when a token with the same name exists, add the timestamp to make it unique.

* bugfixed preset token detection when user create token inside interview

* bugfixed the problem that a created token was not placed in the correct sorting
* now in the interview result page you can see which token were created in which sorting
* code optimization

* now interviews with post-sorting questions are saved
* fixed a bug that shifted the circles up into the screenshot
* optimization for safari

* bugfixed study delete with interview

* now the layout has fixed height, not possible to scroll
* optimization

* now a list of users is available
* optimization

* now you can download the backup from the admin area
* 2 backup: yesterday and today
* gitignore public asset files