Working on gtf parser
Add mm9 gtf file
Remove print statements
Integrate gtf file parsing
Add some logging
Allow NH tag instead of IH
Add some optimizations
Check introns before exons
Avoid repeating checks for transcripts we won't hit
Remove profiling
Only return exon hits if there are no intron hits

When testing a read against a transcript, if we get any intron
hits, we automatically disqualify it, so don't bother testing
for exon hits.
Fix test
Rename quantifyexons to quantify