Allow simple workers to create customers

Co-workers with restricted access rights are now able to create customers.
It already has been possible for workers to create projects as long as they had full "Create data" access to a customer.
In order to grant the user the right to add customers, you will find a seperate option in the co-workers access rights settings. (this information has been updated on 2017-06-27)

Your employee can create customers like this:
- In the customer dropdown of the form “Add time entry”, he will find the function “Create new customer / project”.
- In the time clock, there is a plus button on the top right of the projects list.
The time clock already offers this new feature. For all apps and desktop applications we will provide updates soon.