Replace sugar-webservices by sugar-journalshare

The package have the same functtion, but is generated with a separated
definition instead of need add a patch to sugar.
Add txpaint and txmath rpms
Add opendyslexic fonts
Configure sugar fonts
Use SL to identify SugarLabs images
Add dconf & gstreamer-python to the sugar packages list

dconf is needed by sugar now, we need add it as a dependendy in the rpm
then we can remove it from this list.

gstreamer-python is still used by some activities, like Speak or Clock,
doing "import gst"
Updated configs to create SugarLabs 0.104 images

This config was used to generate 41001SLx images published
on http://wiki.sugarlabs.org/go/0.102/Testing#Testing_with_a_XO
on July 28, 2014.