Extend the front end to allow input of granularity level for batches
Create batches as defined by user
Log exceptions
Give better feedback if something went wrong
Set display title
Set display title
Shorten error message
Add javadoc & bring fields in order
Merge pull request #159 from matthias-ronge/issue_54_2

Merge:  [ZM] Batches nach logistischen Kriterien (#54)