[cfe-dev] Moving named cast helpers out of Sema

[Sebastian Redl]

Hi,

Attached patch moves the C++ named cast helper functions out of Sema and 
makes them static functions local to their own file., as requested by 
Chris. (The patch also moves all named cast stuff to its own file.)

Unfortunately, this requires making a few helper functions that are 
private in Sema public, so I'm not sure if this patch is a good idea. 
What do you think?

The critical changes are those to Sema.h. The others are big but harmless.

Sebastian
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