Moved Static chapter to below Classes, covered constexpr
Processed Steve Andrew's Nov 6 comments until Ch. 18
Processed remarks by Steve Andrews (30-10-2011)
WIP
Added descriptions of stream::init, and of the protected keyword
WIP towards 9.1.0
Processed 1st e-mail by Steve Andrews
friend decl. as fwd decl. (Visciano Nunzio)