[sugar] Sugar daily builds

[Marco Pesenti Gritti]

Hello,

I'll be doing builds for sugar and other core modules every day around 
17.30 UTC.
Make sure to get in the changes you want to go in the images by that time.

This apply to the following modules:

artwork
hulahop
datastore
presence-service
sugar

journal-activity
web-activity
write-activity
xbook-activity

I'll normally build all the modules which have changes, so please make 
sure to always keep stuff working.

Marco