[Systems] My git problem resolved

[James Simmons]

I was having a problem pushing committed changes to gitorious and I 
assumed that the problem was either with the way I created my RSA key or 
a problem with the git server.  After doing some research on the message 
using The Google I found out what the real problem was, and I updated 
the migration instructions to try to include this information.  Feel 
free to improve on what I added, but I think the info is needed for 
those like myself who are new to git.  The page I refer to is: 
http://sugarlabs.org/go/ActivityTeam/How_to_migrate_from_OLPC#Migrating_activities_from_dev.laptop.org

James Simmons