SeqIO/Tinyseq.pm: Fixed an uninitialized value warning from
"_get_writer" by changing '$Bio::SeqIO::tinyseq::VERSION' to
'$Bio::Root::Version::VERSION'. Also cleaned tabs, indentation
and trailing whitespace from both module and test file.
Unflattener: Fix for Bug #3458. Incorporated Bastien Chevreux
suggestions to improve error reports from "problem" subroutine
by adding feature location and locus_tag. Also merged all
tests from 'Unflattener2.t' into 'Unflattener.t' to have
all tests in a single file.