Log message:
math/blas, math/lapack: Install interchangeable BLAS system

Install the new interchangeable BLAS system created by Thomas Orgis,
currently supporting Netlib BLAS/LAPACK, OpenBLAS, cblas, lapacke, and
Apple's Accelerate.framework.  This system allows the user to select any
BLAS implementation without modifying packages or using package options, by
setting PKGSRC_BLAS_TYPES in mk.conf. See mk/blas.buildlink3.mk for details.

This commit should not alter behavior of existing packages as the system
defaults to Netlib BLAS/LAPACK, which until now has been the only supported
implementation.

Details:

Add new mk/blas.buildlink3.mk for inclusion in dependent packages
Install compatible Netlib math/blas and math/lapack packages
Update math/blas and math/lapack MAINTAINER approved by adam@
OpenBLAS, cblas, and lapacke will follow in separate commits
Update direct dependents to use mk/blas.buildlink3.mk
Perform recursive revbump

Log message:
py-uncertainties: updated to 3.1.4

3.1.4:
There is now a single code base for Python 2 and Python 3.

Python 2.7 is now the minimal Python version.

The installation can also now be done through a universal wheel, which helps \ 
with some external projects.

This Git version should have the same uncertainties code as PyPI version 3.1.4, \ 
but some accompanying files have been updated. This should have no impact on \ 
users. Developers are better off using this Git 3.1.4 version.

Log message:
py-uncertainties: use py-numpy/buildink to auto-select based on Python version

Log message:
py-uncertainties: updated to 3.1.2

3.1.2:
Partial NumPy 1.17 fix

Log message:
Update the Python HOMEPAGEs that I missed earlier.

Log message:
py-uncertainties: added version 3.1.1

uncertainties allows calculations such as (2 +/- 0.1)*2 = 4 +/- 0.2 to be
performed transparently. Much more complex mathematical expressions involving
numbers with uncertainties can also be evaluated directly.

The uncertainties package takes the pain and complexity out of uncertainty
calculations.