Resolved issue #577 (mostly); most scripts output filenames written to at end of main

	modified:   scripts/abundance-dist-single.py
	modified:   scripts/abundance-dist.py
	modified:   scripts/count-median.py
	modified:   scripts/count-overlap.py
	modified:   scripts/extract-long-sequences.py
	modified:   scripts/extract-paired-reads.py
	modified:   scripts/fastq-to-fasta.py
	modified:   scripts/filter-abund-single.py
	modified:   scripts/interleave-reads.py
	modified:   scripts/load-graph.py
	modified:   scripts/load-into-counting.py
	modified:   scripts/make-initial-stoptags.py
	modified:   scripts/merge-partitions.py
	modified:   scripts/partition-graph.py
	modified:   scripts/split-paired-reads.py

scripts that WERE updated && notes:

	abundance-dist			already does earlier in script
	abundance-dist-single		already does earlier in script
	count-overlap
	extract-long-sequences
	extract-paried-reads 		explicitly two output files; listed on one line:
					print('wrote to: ' + outfile + '.se' + ' and ' + outfile + '.pe')
	fastq-to-fasta			file output optional; either outputs 'wrote to' message or 'did not write output to file'
	filter-abund-single		already does earlier in script
	interleave-reads		file output optional; either outputs 'wrote to' message or 'did not write output to file'
	load-graph
	load-into-counting		creates various partway files, messages for them already exists.
					'wrote to: ' message only prints on successful program end to ensure being printed
					at the end of output.
	make-initial-stoptags		uncertain how output is written since script uses "htable.save_stop_tags()" instead
					of explicit file write object. 'wrote out: ' message added anyway.
	merge-partitions		No API entry exists for this script!
					Already messages earlier in script
	partition-graph			threading is confusing; potentially multiple files
	split-paired-reads		explicitly two output files; message is:
					"'wrote to: ' + out1 + ' and ' + out2"

scripts that were NOT updated && notes on why:

	annotate-partitions 		already does, multiple files
	count-median 			already does
	do-partition 			already does, multiple files
	extract-paritions		already does, multiple files
	filter-abund			already does, multiple files
	filter-stoptags			already does, multiple files
	find-knots			already does (mostly), multiple files, renames some things without outputting message
	normalize-by-median		personally uncertain about logic flow && script appears to warn on output anyway
	sample-reads-randomly		already does, multiple files
These are line comments, so just line 13 (and 14 by reference)

You no longer are including these files so don't mention them in the ChangeLog.