Added by_id subroutine
nest validation subs in validation braces
use pop
added by_start subroutine
pop message to allow self for find
added basic ability to find a parent
Added TODOs
Added description
Added documentation
Added documentation
Added map_types subroutine to allow common feature types to be recognised regardless of different names used in the gff
created empty order_features and fill_gaps subroutines ready for replacing the make_introns method
Implemented basic 'intron' gap filling and added make_id sub to keep ids unique
fill_gaps can now handle introns and UTRs
Removed redundant make_introns sub
Modified return values for testing
Added nearest_start sub and used in validation_find
make new features with validation_make
Added as_string sub to print features
Implemented validation_force