Delocate

Refactoring, updating and `arm64` (M1) support.

- Libraries depending on `loader_path` are now supported (KB).
- `executable_path` is supported and defaults to the current Python
executable path. This can be changed with the `--executable-path` flag
(KB).
- The `--ignore-missing-dependencies` flag can be given to ignore errors and
delocate as many dependencies as possible (KB).
- Dependencies are now delocated recursively (KB).
- `delocate.delocating.copy_recurse` has been deprecated (KB).
- `delocate.libsana.resolve_rpath` has been deprecated (KB).
- Add required ad-hoc signing for libraries (IF).
- Fix to escape regexp special characters to occur in library names (such as
`++` in `libc++` (Grzegorz Bokota).
- Support for new `otool` output from arm architecture fat libraries (IF).
- Various CI improvements, including refactoring for test wheel generation,
replacing `i386` with `arm64` for dual architectures, and start of
Github workflow tests (MB, KB).
- Various documentation fixes (Brad Solomon, Andrew Murray).

Bugfix release.

- Force UTF-8 for import of README file. 0.8.1 introduced non-ascii
characters, so unguarded `open('README.rst', 'rt').read()` in `setup.py`
gives an encoding error. See GH issue 81. Thanks to Joshua Haberman for
the report.

Bugfix release.

- Adapt parsing of otool output to Catalina, avoiding crash in delocate
(thanks to Github use `matham` for the report)
- Adapt to possibility that `wheel` binary is not on PATH.
- Various improvements to documentation, including explanation of Delocate's
problems in dealing with single module extensions (Brad Solomon)
- PEP8 maintenance by Grzegorz Bokota.

Bugfix and new feature release.

- More extensive search for libraries that code depends on, using macOS path
search algorithm (Forrest Brennen, Ofan Tester).
- Fix for newer XCode messages for "not an object" (Andy Wilson)
- Fixes to Wheel zip file permissions and attributes (Cosimo Lupo and MB).
- Some Windows path compatibility (Isuru Fernando)
- Bugfix for use of undefined variable in `get_install_id` (Anthony
Sottile).

Bugfix release to deal with large number of breaking changes in wheel
0.32.0.

- Refactor to deal with Wheel 0.32.0, with massive refactoring of the API,
and the use of zero permissions RECORD file.
- Refactor to use Pytest (many thanks to Github user Xoviat).
- Beginning of Windows refactor (Xoviat again).

Also deal with xcode 8.3 message from another binary file.