Plugin API : sending notifications to a client

[gdumee]

A plugin should be able to send notifications to a client without any user action.

Ex : "Lisa, tell me to do the dishes in 1 hour".

The ToDo plugin then add a cron task, and is called back one hour later, and sends to the client a message through the TSS engine : "Master, don't forget to do the dishes"

Many other use cases, like reacting from an external event : temperature sensor, a google calendar event, an incoming phone call...

[Seraf]

Hello, I close the issue as discussed on irc, there is an api to let LISA know about events, else you can also create a cron to listen for an event.
For the planned cron, it's duplicate with #27

Thanks you :)