deck update

- updated windows azure logo in all deck
- updated slide 8 (pay per minute instead or pay per hour)
- substituted slide 9 with a new one that contains new vm sizes and recommendations for sql server workloads
- updated slide 12 because it contains wrong info like : "recommendations to put tempdb on D:\ drive". I have also added a reference to this white paper http://msdn.microsoft.com/en-us/library/windowsazure/dn248436.aspx