Set au2a activities group

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
Set favorite activities

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
Disable tree_tarbar generation

Currently, we have no use for this and it consumes
building time.

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
Add flash support

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
add missing gstreamer packages
Add missing GTK2 packages

These packages were removed in cc196b6d9 by Daniel Drake
for dropping GTK2 activities support.

We are adding these as custom packages for now.

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
Remove temp sugar 0.102 repository

These packages has been added to OLPC's official
f20 repository, so there is no need for this custom
repository anymore.

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>