Add a potential fix for AMPHORA2 newick support; this may be
reverted as the format isn't quite valid newick, but it does
work w/o regres`sion in tests.  Test case also added.

Test case and fix from the blog post of Bill Nelson:
http://wcnjournalclub.blogspot.com/2014/02/getting-amphora2-to-work-with-bioperl.html
Interpret Bio::SeqFeature::Lite->new(-strand=>$strand) correctly when
$strand is "+", "-", or ".".
Merge pull request #71 from nathanweeks/issue/bio-seqfeature-lite-strand

Store Bio::SeqFeature::Lite strand correctly when "+", "-", or "."
SeqFeature/Location.t: Added tests for GitHub issue #71 fix
Merge remote-tracking branch 'origin/master' into HEAD