Issue key bug + modulo 6 minutes + usage line + formatting

Bug correction:
- Issue Key was not reinitialized in the ForEach loop.
- Usage had been removed.
Changed:
- Modulo to 6 minutes.
- Formating of brackets: opening bracket on the same line as the
command.
- Removed display of XML.
Added:
- Break and error message if cred file not found.
- Comment for date
- Confirmation if changes have been saved or not.