regedit: Remove windows class names (they shouldn't be localized) and unused IDC_REGEDIT menu from resources.

Add a test to make sure the saved image has the same dimensions as
original. Delete the test file when finished.

Implement the encoding function for GDI+ images so that
GdipSaveImageToStream can encode images as BMP files.

Add the correct framework for a fully-functional implementation of
image encoding (not a hack like before). Currently, only a stub for
BMP encoding is supported. New tests added as well.

Still need to implement saving the image based on the encoder
parameter.
Basic tests included.

rpcrt4: Fix the pointer level being passed into call_unmarshaller in client_do_args_old_format for base return parameters.

NdrBaseTypeUnmarshall expects a pointer to a pointer to a base type. 
pRetVal contains a pointer to a base type, so we need to pass the 
address of pRetVal into call_unmarshaller here.

Don't call memory sizing rountines to compute the size of a type, since
memory sizing routines have side effects like checking there is enough
space in the buffer for the type and incrementing the buffer pointer.
Instead, create a function which returns the necessary size of the
limited set of types we can encounter and remove call_memory_sizer which
is no longer needed.

rpcrt4: Check that the input to RPCRT4_strndupW was not NULL before assuming that the string couldn't be allocated due to lack of memory.