Manpages of bowtie2 in Debian jessie-backports

• bowtie2-align-l(1)
• bowtie2-align-s(1)
• bowtie2-build-l(1)
• bowtie2-build-s(1)
• bowtie2-build(1)
• bowtie2-inspect-l(1)
• bowtie2-inspect-s(1)
• bowtie2-inspect(1)
• bowtie2(1)