[reSIProcate] heap instance counter (compile time optional)

[david Butcher]

Hi all,

I added a utility to count heap instances.
The utility is compiled OUT by default.

I added #include "HeapInstanceCounter.hxx" to most files.
I added a call to RESIP_HeapCount(..) to most classes.

See HeapInstanceCounter.hxx for use notes.

There is no make support for this utility. The controlling macro variable is
RESIP_HEAP_COUNT.

david