TODO create tasks
TODO post comments

Tags:
- Projects list possible tags
- Issues can have a list of tags
- Query supports tags

Custom fields:
- Projects list custom fields
- Query supports custom fields

Other:
- Issues can have a list of related issues
- Query fields are not only StringField but support the relevant classes
- iter_issues can be sorted

This reverts commit 751ddeea.

This patch includes several fixes, the site was updated several times
last months:

 * Add a new URL to get list of years (before: only one URL)
 * Update URL to download document
 * Use reverse order to return last year first

The new download URL has not been tested on other document type, since
my test account only have "renumeration" documents

Site really wants empty json now

hydrargyrum authored Feb 19, 2018 and Romain Bignon committed Dec 30, 2018

Currently, weboob commands still return 0 even when an exception is
raised. Let bcall_errors_handler decide the return code instead of
always 0.

A good return code is hard because of several things:

* there might be multiple exceptions in a BCallErrors, so values
returned by bcall_error_handler (single exception) cannot easily be
combined
* the base implemententation of bcall_errors_handler cannot be polluted
with a lot of exception subclasses

So, any non-MoreResultsAvailable will cause a non-zero return code.

Should fix https://git.weboob.org/weboob/devel/issues/74.