#385 Console2 detection and API.

[adamy]

Require a documented method of determining if a console application is running under Console2,
for example a well-defined symbol within ConsoleHook.

Once detected a new set of console API could then be exposed similar to the native console API, for example
GetConsole2Window()
Read/WriteConsole2OutputW()
Get/SetConsole2CursorInfo()

allowing full console control