Don't use deprecated functions in deprecated files

See #68
Un/installer: add a $network_wide property

And set it during install.

See #68
Un/installer: add method to set a component's ver.

See #68
Properly activate the components during the tests

See #68
Use a string, not an (undefined) var

See #68, 60f2b1c7e00abdb78ab53a7e3ec2bd72bf35e7bf
Have the un/installer run updates too

See #68
Use the un/installer to update the plugin

See #68
Make each type of update optional for each version

That way we don’t, for example, running a useless update on each site
on the network.

See #68
Update plugin installer after 2e4d965

See #68
Use un/installer to update the points component

We just delete the old update functions, because they were marked as
private.

See #68
Update the l10n validator config

See #68