Added Upgrade.txt with the steps that need to be performed when upgrading the software

darcs-hash:20090119175700-58252-935f313d999178bf9d441195e050db6286bc5fd5
Update TODO and freebsd install doc

darcs-hash:20090119180333-58252-9e439366ff95180a36de81c4d3f19559e8c1bd51