a couple orca tips

[Jude DaShiell]

control-alt-f7 is the equivalent of start-m in windows or start-d.  The 
left start key is to the left of the left alt key and to the right of the 
left control key in windows. The control-alt-backspace logs out of and 
back into X and is the equivalent of control-alt-return in windows. Did 
anyone get ubuntu install program to talk using orca?  I haven't yet 
figured out how to do that one yet.