Python's enums are not extensible, values can't be added and they can't
be subclassed. This is problematic if weboob devel adds new values,
because stable weboob will not be able to use them. They would need to
be replaced by a default value or None, which loses information.

Instead, implement custom enums that contain plain constants and support
adding values aftewards.

Python 3.4 added new Enum types that enforce a value belonging to the
enumeration.
This commit retires our homemade enum and use Python's Enum type.
Python 2 compatibility is achieved with "enum34" package.

Housing and Calendar capabilities are updated to use those new enums.

Phyks (Lucas Verney) authored Nov 28, 2017 and hydrargyrum committed Feb 02, 2018

housing queries.

Also add a fix for #59.

Phyks (Lucas Verney) authored Nov 28, 2017 and hydrargyrum committed Feb 02, 2018

Also added some fixes for minor issues with housing modules.

__str__ is reimplemented in terms of __unicode__ and __repr__ else.

* Make it output the postal code in the location field.
* Add a `rooms` and `bedrooms` field in `Housing` capability to store
the number of rooms and bedrooms.
* Update seloger module to fill-in this field.

In Python 2, __repr__ and __str__ shouldn't return unicode.
This caused a problem for example when logging-debug a filter on Thumbnail.url,
as the logger couldn't encode the unicode repr.

Signed-off-by: Simon Lipp <laiquo@hwold.net>

flake8 --select W391,E302,E301,E304

autopep8 can't fix W391 even though it claims it can.
Fixed using a simple custom script.

Remove useless trailing \
Remove trailing spaces
Add missing empty lines

autopep8 -ir -j2 --select=E301,E302,E502,W291,W293,W391 .

Diff quickly checked.