skip bam sort when sort flag header is sorted by coordinate
add bigBed support for user custom track uploads
update annotation help file for custom track uploads
add support for BigWigSet through custom track archive file uploads
add support for USeq files for custom track file uploads
added Juan Tena's split_wig.pl script, which is useful for uploading WIG files from genomes with lots of scaffolds.
Merge pull request #27 from tjparnell/new_upload_options

New upload options
Squash warning resulting from semantic zooming of regionview tracks.
Made region marker height configurable;implemented 'max keyword results' option
Making region marker height configurable to allow click and mousover behaviors for features underneath.
Suppressing error message for semantically zoomed region tracks