[MM] Edited section 5.1

Vassilis,

I've edited section 5.1 [1]  Please check if you agree with the changes 
I've made.  To avoid browser cache problems, please make sure you are 
looking at least at revision 1.115.  I still need to know what you 
wanted to say in the second half of the figure caption that is missing.

Thanks, Jacco

[1] 
http://www.w3.org/2001/sw/BestPractices/MM/image_annotation.html#solution_personal