[IAEP] addons.sugarlabs.org -> activities.sugarlabs.org

[David Farning]

Moved addons.sl.o to activities.sl.o

1 moved tree
2 moved db
3 moved filestore
4 fixed permission
5 updated config.php
6 setup redirect
7 updated apache

next steps
1 update scripts
2 move logs
3 fix strings
4 debug

I would encourage activity developers to start reporting _all_ a.sl.o
bugs to dev.sugarlabs.org.  All the infrastructure and backend stuff
seems to work.  Finally, we can work on the front end.