Make install more flexible

See merge request !418

The current one gets the first environment found
for the python language rather than getting an
active environment for that language.

This will avoid nuking the content of a live system
with the default values for queues, environments, etc.

This refactoring allows to give only a subset of
assets to install. This will allow to fully install
a single asset.

Note that dependencies must be correctly provided.
For example if Protocol Templates are to be installed
on an empty database, the dataformat must be listed
along i.e.:
django install --assets dataformats protocoltemplates

[utils][commands][update_installed_databases] Replace link_database_versions with link_contribution_versions

The former as been removed and replaced
by the later.

Implement db v2 handling

Closes #586

See merge request !417

beat/beat.core> to 1.13.3
beat/beat.cmdline> to 1.10.1

beat/beat.core> to 1.13.3
beat/beat.cmdline> to 1.10.1

Take into account v1 and v2 databases

The "on this account" part has been removed
to make the serializer more generic.

This ensure that the infrastructure still
runs properly with both types of databases.

The handling is a bit different but it allows
to currently use the same infrastructure untouched
for experiment execution.

This avoids the need to have a dedicated version of Database
as well as ProtocolTemplates

It now only tries to install projects based
on the folders inside the beat/beat.examples>.
This will avoid running through the linking
steps again and again when something is not
a project but still listed as one.

This allows to use it with ProtocolTemplates and
possibly Database as well.

This makes it usable with ProtocolTemplate and
possibly Database as well.

This should allow to centralize versionable only
object creation like Database and ProtocolTemplate.

Most of the logic is the usual filter, check if
exists and if not create. This can be replaced
by the get_or_create QuerySet method that does
both in one go.

This allows to properly create it when using the
get_or_create QuerySet method.

Add expiration date and procedure and manual procedure to help users interact with account emails holding a temporary URL

Closes #585

See merge request !416

accurate description

[accounts/ui][views/templates] add expiration date and procedure with temporary url account email messages

Fixes #585

Disable signup for logged in user

Closes #584

See merge request !415

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