r3611: DCOM client support works!!

r3611: DCOM client support works!!

The torture test DCOM-SIMPLE now successfully does an
IStream_Read and a IStream_Write call.

This test can now be run successfully against the "Simple DCOM" Visual
Studio example.

(You have to quote out line 337 in pidl. pidl complains if the variable
 that contains the array size follows the array. I still need to fix this
 properly)

Next goals:
 - Clean up code
 - Server side support
 - Support custom marshalling
 - Support DCOM interfaces in files other then dcom.idl