Currently no samtools_bam2fq.py

Unlike my samtools idxstats wrapper etc, there is no BAI file to
worry about here.
Forgot to include tool_dependencies.xml for Tool Shed upload
Automate (re)generation of samtools bam2fq test files
Test file with samtools bam2fq -n option (no suffices)
Add samtools bam2fq -n and -O options