gnu: python-coverage: Update to 4.1.

* gnu/packages/python.scm (python-coverage): Update to 4.1.

gnu: python-setuptools-scm: Update to 1.11.1.

* gnu/packages/python.scm (python-setuptools-scm): Update to 1.11.1.

gnu: Add python-jedi.

* gnu/packages/python.scm (python-jedi, python2-jedi): New variables.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu: python-websocket-client: Update to 0.37.0.

* gnu/packages/python.scm (python-websocket-client): Update to 0.37.0.
[source]: Use pypi uri format.

gnu: python-psutil: Update to 4.3.0.

* gnu/packages/python.scm (python-psutil): Update to 4.3.0.
[home-page]: Update home-page.

gnu: python-numexpr: Update to 2.6.0.

* gnu/packages/python.scm (python-numexpr): Update to 2.6.0.

gnu: Add python2-pytest-cache.

* gnu/packages/python.scm (python2-pytest-cache): New variable.
(python-pytest-cache)[properties]: New field.

gnu: python2-pythondialog: Update to 3.4.0.

* gnu/packages/python.scm (python2-pythondialog): Update to 3.4.0.
[source]: Use pypi-uri.

Co-authored-by: Leo Famulari <leo@famulari.name>

gnu: Add python-urwidtrees.

* gnu/packages/python.scm (python-urwidtrees, python2-urwidtrees):
New variables.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu: python-sphinx-repoze-autointerface: Update to 0.8.

* gnu/packages/python.scm (python-sphinx-repoze-autointerface,
python2-sphinx-repoze-autointerface): Update to 0.8.

gnu: python-cryptography, python-cryptography-vectors: Update to 1.3.4.

* gnu/packages/python.scm (python-cryptography, python2-cryptography):
Update to 1.3.4.
[source]: Use pypi-uri.
(python-cryptography-vectors, python2-cryptography-vectors): Update to 1.3.4.
[source]: Use pypi-uri.

gnu: Add python-prompt-toolkit.

* gnu/packages/python.scm (python-prompt-toolkit, python2-prompt-toolkit):
New variables.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu: python-wcwidth: Add missing 'properties' field.

This is a followup to commit a44fd439dcef88b33c00db94fb3419e097401fee.

* gnu/packages/python.scm (python-wcwidth)[properties]: New field.

gnu: python2-orator: Rearrange inputs.

* gnu/packages/python.scm (python2-orator)[native-inputs]: Move
python2-ipaddress ...
[propagated-inputs]: to here.

gnu: python-orator: Rearrange inputs.

* gnu/packages/python.scm (python-orator)[native-inputs]: Move
python-arrow, python-blinker, python-cleo, python-fake-factory,
python-inflection, python-lazy-object-proxy, python-pyaml,
python-simplejson, python-wrapt ...
[propagated-inputs]: to here.

gnu: python2-fake-factory: Rearrange inputs.

* gnu/packages/python.scm (python2-fake-factory)[native-inputs]: Move
python2-ipaddress ...
[propagated-inputs]: to here.

gnu: python-fake-factory: Rearrange inputs.

* gnu/packages/python.scm (python-fake-factory)[native-inputs]: Move
python-dateutil-2, python-six ...
[propagated-inputs]: to here.

gnu: python-email-validator: Rearrange inputs.

* gnu/packages/python.scm (python-email-validator)[native-inputs]: Move
python-dnspython, python-idna ...
[propagated-inputs]: to here.

gnu: python-cleo: Rearrange inputs.

* gnu/packages/python.scm (python-cleo)[native-inputs]: Move
python-psutil, python-pylev ...
[propagated-inputs]: to here.

gnu: python-arrow: Rearrange inputs.

* gnu/packages/python.scm (python-arrow)[native-inputs]: Move
python-dateutil-2 ...
[propagated-inputs]: to here.