Added rgb8 support.
Added cache of frame offsets to VinFile.
Misc hacks to grab rgb8 data.

Search sys.path if the filename isn't found.
Include osdefs.h.

two raise posix.error if symlinks aren't supported).

Improved setwincursor() to allow None to explicitly turn the cursor off.

Forget about the temp file.

Count lines in Python.

except get*str*arg --> get*Str*arg; get*str*arg fetches a C string.