extend linalg and array operations to work on Numbers when it makes sense and is unambiguous
fix rref for complex matrices (issue #1869)
Fix null
Merge pull request #1872 from stevengj/complex_rref

fix rref for complex matrices (issue #1869)
Merge pull request #1871 from stevengj/linalg_scalar

RFC: extend linalg and array operations to work on Numbers when it makes sense
Merge pull request #1874 from andreasnoackjensen/fixnull

Fix null
Fix lp-norm for integer vectors
Merge pull request #1877 from andreasnoackjensen/fixintnorm

Fix lp-norm for integer vectors
- make workers work with multiple adapters in local case
Change seed functions to give the same random numbers on 64 and 32 bit machines.
Merge pull request #1881 from andreasnoackjensen/randomrepro

RFC: Reproducible random numbers
Merge pull request #1880 from swadey/master

allow worker to work when a host has multiple IP addresses (remove merges from #1879)
Update doc/manual/running-external-programs.rst

run now seems to return nothing rather than bool. 

added a way to read the output of the command. 
Merge pull request #1882 from aviks/patch-1

Update external programs documentation
Make.inc, deps/Makefile: rename HOST => XC_HOST.

This is a rather unfortunate Make variable name since
it is automatically defined in OS X shell sessions.
(Worse still, if you try to unset it, it crashes your
shell upon accessing that environment variable.)
srand: make integer seeding only depend on the *value* of the seed.

This guarantees that no matter what the type of an integer seed
used to seed the RNG, the same seed vector will result, depending
only on the value of seed given. This ensures identical behavior
on 32-bit and 64-bit systems if integer literals are used for
seeding. If you want more control over the seed vector, supply an
actual Vector{Uint32} of seed data.

This reverts commit 370f0334a3ad0e6c8c8e44a6e2c7ab041a960f67.
fix #1866 (darwin gmp build failure)
Use LAPACK to estimate 1 and Inf norm. Change norm to return Float. And some tests.