pytype: introduce configuration for running pytype

Install pytype and dependencies on Python 3.8 with:
pip install --upgrade -r pytype_requirements.txt

Checks can then be run with:
pytype

i18n: disable 'no-wrap' on extract_messages to align wrap settings with weblate

In Weblate, the default wrap settings are used and this is not configurable.
This means that .po files will have wrapping at 76 characters.

On the other hand, the 'extract_messages' method in Kallithea was configured
to not wrap at all. When regenerating .po files based on a new .pot file,
there could thus be wrapping changes, back and forth.

Avoid this by removing the 'no-wrap' setting and falling back to (hopefully)
the same default as Weblate.

Instead of:

msgid "very long line"

it will now emit it more readable:

msgid ""
"very long "
"line"

pytest migration: switch to pytest; remove nose support

Make pytest the default test runner and remove support for nose.
Tests can be run using:
- py.test
- python setup.py test

The pytest configuration needs to move from setup.cfg to pytest.ini to support
this - see https://github.com/pytest-dev/pytest/issues/567 and
https://bitbucket.org/pytest-dev/pytest-runner/issues/7/support-all-pytest-commands .

tests: move pytest settings from kallithea/tests/pytest.ini to setup.cfg

pytest.ini was added in 9b8ba0f1c87b but didn't work. pytest only uses one
configuration file and does not merge settings from multiple files [1]. The
first detected file is setup.cfg thus should contain all relevant
configuration.

[1] http://pytest.org/latest/customize.html#initialization-determining-rootdir-and-inifile

tests: restrict pytest test collection to kallithea/tests

When the kallithea root directory contains a populated virtualenv, pytest
would also collect tests in python packages installed there.

Restrict the tests to be considered to any test_*.py file inside
kallithea/tests.

Additionally, by renaming unwanted test files in kallithea/tests/scripts to
_not_ match this pattern, we can completely get rid of the 'norecursedirs'
option.

tests: restore pytest norecursedirs default patterns

This replaces d741b99effdf by adressing the root cause: 5c8c77b7ca56 removed
the default exclude of .* (and thus also .eggs/ used by latest setuptools) and
*.egg (used by older setuptools).

tests: Move pytest config (norecursedirs) from tox.ini to setup.cfg

Avoid (conceptual) dependency on the tox meta test runner configuration.

setup.cfg: remove http://www.pylonshq.com - it is nolonger available

https://groups.google.com/d/msg/pylons-discuss/cypPARmbh_0/lGA6nsE40fIJ
recommends removing it.

Correct licensing information in individual files.

The top-level license file is now LICENSE.md.

Also, in various places where there should have been joint copyright holders
listed, a single copyright holder was listed. It does not appear easy to add
a link to a large list of copyright holders in these places, so it simply
refers to the fact that various authors hold copyright.

In future, if an easy method is discovered to link to a list from those
places, we should do so.

Finally, text is added to LICENSE.md to point to where the full list of
copyright holders is, and that Kallithea as a whole is GPLv3'd.

First step in two-part process to rename directories to kallithea.
This first step is to change all references in the files where they refer
to the old directory name.

updated pot file and extract_messages defaults

- don't wrap long lines
- update copyright and header info

Implemented whoosh index building as paster command.
docs update
fixed manifest.in for missing yui file.
Fixed setup to beta
added base for paster upgrade-db command

Version bump,freeze of dependent libs.
Little test update

#37 fixed json imports for python2.5
removed cache manager settings out of meta to ini files
docs update.

Improved testing scenarios. Made test env creator
Fixed hg_model error message
some other tweeks and fixes
Models fixe for uniq email, and removed some extra not needed imports from model main module