[gtk-osx] (48 commits) ...Merge branch 'pipenv'

[John Ralls <jralls src gnome org>]

Summary of changes:

  46005b0... Rewrite setup script to create a pipenv/pyenv virtual envir
  2795ea4... Rewrite README in markdown with much more detail.
  a45a352... Convert core modules to meson.
  4868534... Clean up unnecessary or obsolete modules from bootstrap.mod
  ed6a035... Clean out old setup and rc files.
  8fff555... Adjust libxml2 python-install-dir to use the virtenv's vers
  61f3f3a... Install the libxml2 python modules in correct directory for
  e17073f... Specify python 3.6.
  c4d31b1... Fix inserting  into .local/bin/jhbuild.
  318fa14... Move CFLAGS and PYTHON_CONFIGURE_OPTS from jhbuild to pipen
  00c689f... Autogen python modules with autoreconf.
  a9124ad... Set -Dx11=false on gdk-pixbuf in modulesets-stable and modu
  e9c8cc9... archive.gnome.org shouldn't be a default repo.
  ccd5b64... Move gtk-doc from gtk-osx-bootstrap to gtk-osx.
  f525c11... Add the virtenv lib/pkgconfig to PKG_CONFIG_PATH.
  3ad0e7f... Fix dereferencing of _varname in envvar().
  0495acf... Quote all paths to accommodate spaces in them.
  2126c10... Set and use PIP and PIPENV so they don't have to be on the 
  8e3c261... Specify jhbuild remote and branch to pull.
  75af84c... Add DEVPREFIX/bin to PATH
  635717a... Check for ninja in DEVPREFIX/bin as well as PATH before ins
  8e27043... Separate pyenv installation from pyenv_root.
  6d11413... Force pipenv to version 2018.10.9 and meson to 0.49.2.
  72b4ac3... Make WORKON_HOME consistent and correct.
  2425963... Update installation of jhbuildrc and jhbuildrc-custom...
  8b41e85... Fix a few mistakes.
  681a0a5... Don't set sysroot without an SDK.
  17ac4d8... Don't use envvar for regular file.
  c65712f... Correct missing variable errors.
  c98ca6c... Provide bogus meson module to silence complaint from jhbuil
  5d6ccf8... Create a new bootstrap-gtk-osx command
  0e9ad21... Fix the python version passed to libxml when in a virtualen
  99359f5... Readme: fix some typos.
  b3f3712... Update paragraph about installing Python3.6.
  33d0961... Fix two if-test goofs.
  5d2cb0d... New instructions for bootstrap-gtk-osx command.
  1a01657... Remove 32/64 bit universal build for expat, perl ARCHFLAGS.
  b2ed87f... Fix script name documentation, python version test for pip 
  339252d... Change BASEURL to catch new jhbuildrc and jhbuildrc-custom.
  905440d... Make sure directories for jhbuildrc and jhbuildrc-custom ex
  0d7b042... Fix finding bootstrap.modules locally.
  7565126... Minimum MacOS Version now 10.9
  96d8dd7... Set config folder to $HOME/.config if not existing, fix min
  0535434... Fix typo with config_dir.
  b960aa0... Rework config_dir computation. Add some safe quotes.
  52ea682... Fix in case of existing $HOME/.config/jhbuildrc and $HOME/.
  69903ff... Avoid crash if _python_ver comes up empty.
  d7adee9... Merge branch 'pipenv'