compiling CVS

[Angus Leeming]

Three points:
1. Renderer.[Ch] and XPM_Renderer.[Ch] are required by the source code but not
present. I got them out of Baruch's patch directly. (I use "cvs update -dP".)

2. ios::noreplace does not appear to be a part of the modern standard. At
least, DEC's compiler throws it out. I therefore removed it from
XPM_Renderer::isImageFormatOK()

3. Throw in a few using directives and all compiles fine.

Angus