* gitignore pycache folders (apparently appear for some)
* update xlwt requirement: 1.1.2 does not work with Python 3.6, 1.2 should work, 1.3 officially supports it

- jcconv is not P3-ready and is only optional, for use on the POSBox
  firmware for Japanese charset support in some receipt printers
  (The POSBox firmware is still based on Odoo 8 + PY2 at this time)

- wsgiref is built-in since Python 2.5, and the one on pypi does not work
  on Python 3.2+

Version 2.7.1 is not yet available in most distributions,
but is now considered the recommended version.

Odoo will work just fine with any psycopg2 version >= 2.2, though.

update ofxparse to 0.16: fix language issues

closes #15713

The vendored html2text is *really* old and absolutely not
P3-compatible.

There is a maintained version on Pypy which is, so use that and stop
vendoring html2text.

PyPDF is unmaintained and abandoned (as noted on its home page
http://pybrary.net/pyPdf/) and was never updated to Python 3. PyPDF2 is
a fork which provides a mostly compatible API and is P3-compatible.

Replace PyPDF by PyPDF2.

- RML Reports
- Webkit Reports (most part already removed by 13b9982c)
- LocalService in netsvc.py
- rename attributes like rml_% to report_%
- rename ir.actions.report.xml to ir.actions.report
- allow rendering directly on an ir.actions.report by calling render method
- remove 'controller' report_type
- remove unused res.font stuff
- remove print_report method in models.py (not used)
- restore removed call to pdftotext process in test_reports

* LDAP import: python-ldap is not python3-compatible, pyldap is

  Warning: only supported from debian Stretch (current testing)?
  https://packages.debian.org/search?searchon=names&keywords=pyldap

* implicitly relative imports
* imports of moved or removed stdlib modules

issue #8530

Needed to import xlsx files

Closes #15644

In order to circumvent https://bugs.launchpad.net/lxml/+bug/1625506

closes #13721

The stdlib version of the json library is more recent than the 3.5.3
version we are pinning in `requirements.txt`

There is no reason to use it.

Closes #6940

The `unittest2` package is simply a backport of `unittest` from the
Standard Library of Python 2.7 to previous versions.

There is no reason to use it any longer.

Closes #6941

gevent 1.0.1 (old) causes issue on Debian 8.0 Jessie : Disk running out of free space
Cause: /var/log/syslog and /var/log/daemon.log full of "NameError: name 'PROTOCOL_SSLv3' is not defined"

FYI: disk of 20GB runs out of space in less than 24h!

gevent 1.0.2 release notes : https://github.com/gevent/gevent/blob/1.0.2/changelog.rst#release-102-may-23-2015

switch to reportlab 3.1.44 because of install problems with 3.1.8
(See https://bitbucket.org/rptlab/reportlab/issues/55/setuptools-80-cannot-install-reportlab-318 )

Workarounded https://launchpad.net/debian/+source/openssl/1.0.1j-1 by updating
requests in requirements.txt and pip in our tests environment.

This library is a SOAP client. It will be used to integrate Odoo with
external web services that use SOAP based protocols.

PyChart 1.39 is available on pypi.python.org, use it
in dependency specs instead of the direct link to
unreliable download.gna.org

Closes #6781

While calling `pip install -r requirements.txt`, the PyChart tarball is
always downloaded even if `pip` has a download cache configured (which
it does by default in later versions).

This is because `pip` has no way of knowing which package the PyChart
tarball contains before downloading and running its `setup.py`.

By declaring the PyChart "egg" in `requirements.txt` the tarball is no
longer downloaded if it's already in the download cache.

It is never used in the code, and causes problems with wheels: related
to pypa/pip#2105

closes #3744

[FIX] requirements.txt: add info about optional python requirements used for the point of sale receipt printing