add PlainMemory manipulator for using with Safe policy in bstreams

[GoogleCodeExporter]

For a little more flexibility using Safe policy, if we have a class which not 
overload operator<<, a PlainMemory manipulator could be added to use default 
operator<<.

so:

class Foo; 
out << PlainMemory(Foo) 

should work

Original issue reported on code.google.com by hugo.arregui on 19 Jan 2012 at 1:57

• Blocked on: #58

[GoogleCodeExporter]

Original comment by hugo.arregui on 21 Feb 2012 at 8:32

• Changed state: Accepted