New test for star module
Added another test for the star module
Updated star strand handling, tests

I am now keeping the star strand information because I found how it is
defined
(https://groups.google.com/d/msg/rna-star/B0Y4oH8ZSOY/NO4OJbbUU4cJ). I
have updated all of the tests except for the one that tests the
filtering procedure. I used the external annotation's stand in that test
so I'm trying to decide whether I should do that or use STAR's strand.