libgpkg: fix missing spaces in caveats
nonpareil 2.303

The sha1 was updated to v2.303 and the “version” test was replaced by a
meaningful test with mock sequences.

Closes #671.
picard-tools 1.107
cgns 3.2.1
bowtie2 2.2.0

Handle bowtie2 being a relative symlink.
Install documents.
Jellyfish: upgrade to 2.0.

Add appropriate `fails_with` statements.

Closes #680
bowtie2: Add head
armadillo 4.000.4
Scalapack: add option to skip tests.
edirect 1.00: New formula

Entrez Direct, the Entrez utilities on the UNIX command line
abyss: use spec deps
beast: use spec deps
bowtie2: move conditional into method
bpel2owfn: use spec deps
fastx_toolkit: use spec deps
genet: use spec deps
hmmer: use spec deps
lola: use spec deps
mtl: use spec deps
ray: use spec deps