[sugar] Update.1 activities download script

[Bert Freudenberg]

Hi Scott, and all,

I made a script that downloads and installs or upgrades the official  
activities for Update.1 from the repository at:

http://mock.laptop.org/repos/local.update1/XOS/Dictionary-1.xo

The script is available at

http://dev.laptop.org/~bert/update-activities.py

and it makes testing these activities on build 700 rather simple.

Usage: update-activities.py [options] [ACTIVITIES]

If no ACTIVITIES are listed, operate on all activities

Options:
   -h, --help      show this help message and exit
   -u, --upgrade   upgrade installed activities [default]
   -i, --install   install non-installed activities
   -d, --download  only download, do not actually install or upgrade
   -l, --list      only list, do not actually install or upgrade

To save download time, do something like this first:

cp -a /usr/share/activities/*.activity /home/olpc/Activities

I also noticed problems with some of the .xo bundles, see

http://dev.laptop.org/ticket/6696
http://dev.laptop.org/ticket/6697

And finally, there is a trick in the script so it connects to the  
current Sugar session even if run from the console or via ssh - may be  
useful to somebody:

if not 'SUGAR_PREFIX' in os.environ:
   """Connect to running Sugar session"""
   cp = ConfigParser()
   cp.read(env.get_profile_path('session.info'))
   os.environ['DBUS_SESSION_BUS_ADDRESS'] = cp.get('Session',  
'dbus_address')
   dbus.set_default_main_loop(dbus.mainloop.NULL_MAIN_LOOP)

- Bert -