Select-Patterns (greps) filter parameter default requires 'LOOPZ_GREPS_FILTER' to be defined in environment

[plastikfan]

If LOOPZ_GREPS_FILTER is not defined, then currntly the command will fail. A check needs to be made before proceeding, that if not defined, then should default to something sensible like all files in the current directory ./*

[plastikfan]

Rename to Select-Patterns