A first clean-up of the rule package
Parsing WMO IDs that include underscore characters
Fix of broken test
Added AVHRR dimensions
Removed wrong patterns in comment
Answered Tom's comment
Implemented new sensor names for AVHRR FRAC products
Added configurations for AVHRR subscene MMDs in test period
Added sensor names as constants for AVHRRs
Added configuration for final AVHRR MMDs
Facilitate extraction of 2D shapes (single column)