Avoid adding more that one “XMPP reconnection” timed event at the same time

Fix a semblance of infinite and busy loop, that could occur if biboumi’s
poller is woken up multiple times while the XMPP server is not reachable.

Refactoring louloulibs and cmake

Use OBJECT libraries
Remove the louloulibs directory
Write FOUND variables in the cache

Do not add 1ms to the timeout of our poller

Can’t remember why I did this, but that must be a stupid reason. Everything
must work even with a timeout of 0.

Style fix

Move all constructors at the top of classes

louloulibs is directly included, instead of being a submodule

Because this is a nightmare to manage