perf: added calls to flockfile()/funlockfile() for more efficient reading
refactor: eliminated stray uses of (char *) to point to memory
fix: Added measure of caution for very long file names or command lines
feat(robjutil): improved verbose reporting
fix: eliminated spurious call to fclose() on pipe
fix: added check for pipe command return status
Made addFace() into a public routine as well, so tools can add geometry
Made some useful routines public from readwfobj.c
Fix for missing popen() in Windows
Created robjutil tool to manipulate Wavefront .OBJ files
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