FeatureIO.t: Fixed several failing tests that were using
wrong arguments on the methods (maybe attribute names that
were changed in the past), or were expecting wrong returns.
Now in linux all tests pass, but in windows Bio::GFF3::LowLevel
fails to install, so can't test yet
Moved "use" statements into BEGIN blocks in Feature.t,
faldo.t, gff3.t and gtf.t tests files,
and added number of expected tests where missing