Grouping and excluding

• Add warnings to Nagios output
• Add include option to group configuration
• Add report groups that allow to exclude reports from output

Improve Nagios output

Remove status text from Nagios output

The OK, CRITICAL etc. status is added automatically by Nagios according to the return code. Thus, we can remove it from the text output.

Configurable output

• Output format can be configured
• Nagios output format included

Initial release

First release, only tested with TYPO3 7.6