factor out ascii input/output.

First step - factored out everything the logging classes
use ( so only output ).

Moved the script-level configuration to logging/main,
and made the individual writers just refer to it -
no idea if this is good design. It works. But I am happy
about opinions :)

Next step - add support for input...

src/Desc.h

@@ -118,6 +118,7 @@ public:
 
 	// Bypasses the escaping enabled via SetEscape().
 	void AddRaw(const char* s, int len)	{ AddBytesRaw(s, len); }
+	void AddRaw(const string &s)		{ AddBytesRaw(s.data(), s.size()); }
 
 	// Returns the description as a string.
 	const char* Description() const		{ return (const char*) base; }