Update to merge.pl
Changed the behaviour for Ensembl pseudogene transcripts. Now if an Ensembl pseudogene
overlaps a Havana protein coding gene (and is not fully merged with a Havana transcript)
the Ensembl transcript will not be copied and instead will be deleted. Previously in this
scenario the Ensembl transcript would have not been copied, but would have been kept as
an Ensembl only gene