[erp5_l10n_zh] Initial release of Chinese (zh) translation
WebDAV: Subfolder of CMF Folder were created at the root of the site.

As MKCOL_handler() is not implemented on OFS.Folder.Folder class, the one from
ERP5Site was acquired when calling webdav.NullResource.NullResource.MKCOL().
support language property in Credential Update to update person's language property.
Do not hard code imgs especially from KM theme (use cSS instead)
Do not hard code imgs especially from KM theme (use cSS instead).
Forgotten be part of  9a7106783b8c05d7f176e3be17328774fd123db4
Set form's enctype so we can use to upload files (attachments) to a discussion thread.
typo on email address
Add an empty <p> at the beginning of reply body

Otherwise with CKEditor it's not possible to add some text outside of quoted
content
CKEditor: declare a style for blockquote for event replies
avoid possible KeyError in _removeAllButLastWorkflowHistory().
Add new categories to select constraints in each step of the upgrade
Extend method to be possible filter constraint by contraint_type
Add Script Constraint document, view and actions

Also, Added constraint property sheets to Script Constraint portal type
[ERP5 Configurator] Rename _build to _checkConsistency to follow Constraint API

The logic of all Configuration Items was not changed, but now the
changes are applied only if fixit is True and the constraints are
filtered by constraint type equal configuration.

Cosmetic: Trailing whitespaces were removed in the same commit
Add test to simulate the issue with the method TemplateTool.installBusinessTemplateListFromRepository

Using the method try to install Business Templates that are already
installed, the Business Templates is uploaded on ERP5 but not used. It
creates a lot of garbage because in the end you have many bt5s not
installed.
inherit Base for reuse methods fixConsistency / checkConsistency
Simplify erp5_upgrader to be possible upgrade any project just enabling the alarms that all Constraints will be called and fixed.

The alarms were renamed to cover each step of upgrader and give the possibility to call each step manually one-by-one. Also, all Scripts that the logic can be done by installing Business Template was removed.

Also added:
 - Constraints that can be used in the upgrader
 - Unit test to check different scenarios
 - Extend external method to be possible dump workflow chains to be compared with all configuration defined on Business Templates
Add Business Template with Constraints as a example of bt5 with all configuration required to upgrade
Add ConstraintType property sheet to all constraint portal types
Improve code because is not needed call fixConsistency twice

Also, consider the error list when fixit is False only