Bump TMV-CPP version to 0.72

Closes #782.
add gal-sim: a galaxy simulation toolbox.

GalSim is a package for simulating astronomical images of galaxies.
It was developed to support the upcoming "Great3" challenge,
http://great3challenge.info/, to test different methods for measuring
weak gravitational lensing, a key way of measuring mass in the
universe through its bending of light.

Closes #545.
Vigra: add cxx11 option, fix python site-packages install path

Closes #774.
Vcftools: updated to version 0.1.12a

Closes #784.
suite-sparse: Fix conflicting openblas dependencies

Fixes breakage with numpy --with-openblas because of conflicting
dependencies: numpy asks for homebrew/science/openblas while suite-sparse
just asked for openblas, and homebrew did not realize they were the same
thing. This seems to be a recurring issue that was causing a lot of problems.

Closes #767. Fixes Homebrew/homebrew#27752.
vcftools: force new version

Override alpha/beta versioning for new release.
hotspot 4.0.0 (new formula)

Closes #739.
hotspot: add test to caveats
Migrate dotwrp, qrupdate, slicot to homebrew-science