working on exporting just strings, not symbols, part 2
working on exporting just strings, not symbols, part 3
random real numbers have changed

The MPFR library changed the way it generates random real numbers in version
3.1, and we've been using their routine, mpfr_urandomb.  The new code is
supposed to give the same answer for every architecture.

This commit fixes one of our test files.
fix failing test in package NumericalAlgebraicGeometry

... because mpfr's random real number generator has changed.
Merge branch 'master' of github.com:Macaulay2/M2
fix a test

... because MPFR changed the way it generates random real numbers
rename a makefile target
turn on parallelism in packages directory
add wget to INSTALL
fix library makefile
undo previous commit

There was a bug - curl can be used, instead.
fix packages Makefile for parallelism
fix packages Makefile for parallelism
fix packages Makefile for parallelism, part 3
disable keep-alive when getting web pages
update INSTALL for Mac
make factory insist on a modern version of automake
improve shared library installation
fix flawed install procedure for shared libraries

(wildcards are expanded when the Makefile is read, before the files
in question are created)
fix packages directory makefile

(make package Style get installed before any other)