* maximization (also partially fixes strange Firefox behaviour)
* sane initial window placement
Firefox is stranger than most; it appears to maximize to double
X Screen width even on single head displays. Fixed (on multihead).
Mostly this is adding appropriate #includes and declarations,
but for WmImage.c we also change from using the proper name
for XmeGetMask, rather than the identical but renamed
version _DtGetMask which is not exported in any header.
Peter Howkins