Merge pull request #84 from satta/master

Improve error reporting
Added license
Merge pull request #85 from aslett1/master

Added license
Added AUTHORS file
Merge pull request #86 from aslett1/master

Added AUTHORS file
make sure internal stop codons do not crash Crawl
fix FTP test case
Merge pull request #87 from satta/codon_crash

Fix silent crash when encountering internal stop codons.