Adds location widget to pseudogene page #1603

Squashed commit of the following:

commit 49a91f807a61c116506edd55bc78956490d8d371
Author: Jean-Daniel Wong <jdmswong@wormbase.org>
Date:   Thu Oct 10 16:27:13 2013 +0000

    pseudogene implements PRIMARY_GENE_TRACK gbrowse track, untested

commit 2b3a03f8a6093f1b702da5f2a934ee7bd26aaf7f
Author: Jean-Daniel Wong <jdmswong@wormbase.org>
Date:   Tue Oct 1 17:51:47 2013 +0000

    Added location, which tracks to choose?