opencv: add libdc1394 as optional dependency

Closes #1167.
spades 3.1.1
swrcfit 1.3 (new formula)

Closes #1161.
Nexusformat: adding recommended hdf4 dependency

Closes #1166.
vips 7.40.8

Includes fix for jcupitt/libvips#172.

Closes #1172.
openni2: fix patch shasum

Closes #1169.
edirect 2.00
proverif 1.88.1 (new formula)

Closes #1168.
edirect: Update sha1
edirect: Add tag
picard-tools 1.120

Closes #1184.
seqtk/tabtk: Update and move tabtk to separate build

The latest seqtk GitHub moves tabtk to its own repo, breaking HEAD
(chapmanb/bcbio-nextgen#592). This creates separate builds for both,
fixes the tabtk issue, and moves to GitHub versioning of seqtk/tabtk
since it doesn't have a formal release process.

Closes #1183.
abyss: Add bioinformatics tag
pbsuite: Add dependency on blasr and python

Add bioinformatics tag and the DOI for PBHoney.
abyss: Run make check and add --without-check
edirect: update sha1
pcl 1.7.2 (new formula)

Closes #1181.
paml 4.8a
pear 0.9.5
wcstools 3.9.0