Add setup.py to allow for pip installation

See merge request uis/sysdev/devgroup/ibis/ibis-client!1

Minimal setup.py enables installation as a Python package using
pip, e.g. `pip install .` from within the directory.

Could also be used directly from the git repository, for example
in `setup.py`:

```python
setup(
    install_requires=[
        "ibisclient @ git+https://gitlab.developers.cam.ac.uk/uis/sysdev/devgroup/ibis/ibis-client.git"
    ]
...
)
```

updates.

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(LQL) can be used through the API.

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updates.

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container, holding the specific version of ApiGen known to produce
decent results.

This is necessary because that version of ApiGen requires PHP 5 (it
doesn't work with PHP 7), and newer versions of ApiGen are currently
completely broken, and don't support half the options necessary to
produce decent output.

The docker container is based on alpine (just about the smallest
linux distro available), with the required PHP 5 packages, and ApiGen
copied in.

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The old technique was horribly out-dated, and no longer worked on my
machine, following an OS upgrade.

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client to use the latest TLS version available on both the client and
the server.

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by both the client and the server.

Currently, the server supports TLS 1.0, 1.1, 1.2 and 1.3 (and no SSL
versions).

Back when this code was written, it only supported SSLv3 and TLS 1.0,
so forcing TLS 1.0 made sense, but things have move on since then.

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method to return all people (in batches, sorted by CRSid).

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Also included the root certificates themselves, and all intermediate
certificates we have ever used, just for reference, and instructions
on how cacerts.txt is constructed (from the root certificates alone).

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QuoVadis root certificate for the python and PHP clients. Java ships
this by default, starting with Java 8u91.

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and PHP clients to allow them to connect to lookup-test, which has
had its certificates renewed.

This will be necessary for clients to connect to live Lookup when its
certificates are renewed in Jan 2019.

No change needed for Java clients, provided that they are running on
Java 8u91 or later, which ships with this new root certificate.

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Fixed a typo in the docs for the IbisInstitution DTO class.

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certificate and hostname checking when connecting to localhost (for
testing only).

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in the python and PHP XML parsers, fixing a problem parsing the
membersOfInst field of groups.

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The membersOfInst field in the group DTO class needs a special case
when it is being parsed, since its XML element tag name differs from
the usual name that institution XML elements have.

Added a new unit test to test this, and fixed an existing test to
reflect a change in the Lookup test data, so that all the tests pass
again.

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documentation, and includes a few improvements to the Java and Python
documentation.

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This involved some tweaks to the code comment blocks, using a
combination of Javadoc tags and markdown/reST markup.

Also needed to fix the generated results in a few places (did also
try phpDocumentor, but the results were nowhere near as good and
would have required a lot more fixing up).

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method names. Also added support for PHP docs (to come).

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documentation.

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* Adds python 2 and 3 documentation.

* Updated javadocs, now built using Java 7.

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the input files have changed and reports "Nothing to do". Always
delete the old tar file immediately before running the tar task.

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updates to the build script to keep the build output stable when the
sources haven't changed.

Make all the files in the Javadoc tarball have a common prefix
directory, so that unpacking it creates just one directory.

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to allow Python documentation to be generated using Sphinx.

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documentation.

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Previously the order was unspecified and the server would usually
list them in the order they were defined in the source code, but
would occasionally switch to a different random order. Their order is
now fully deterministic (path, name).

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this can be made to produce better looking javadocs. Keep using Java
6 to compile the client JAR file, to maintain backwards compatibility.

Annoyingly, when using Java 7 the order of attributes in the WADL
file changes, which leads to a large number of diffs, even though the
API hasn't actually changed.

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QuoVadis root certificate in the Python and PHP clients.

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code. The certificates on the Lookup server are about to be updated,
and the new certificates will be signed by this new root.

This update will be needed by many systems using Python and PHP,
since the default is for them not to include any root certificates.
Java clients won't be affected, since Java uses the system's default
root certificates.

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* Fixes boolean and date-time parameter passing bug in PHP.

* Updated unit tests.

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