.cvsignore files

[Trent Piepho <xyzzy@speakeasy.org>]

If nobody has a problem with it, I'm going to commit some .cvsignore files. 
These files contain a list of files which cvs should ignore.  Normally, you
put things like the compiled binaries and generated header files in here, so
that cvs update doesn't show lines like:

? robots/.depend
? robots/puck
? robots/mars
? robots/robotII
? robots/basep
? robots/inl

indicating that the files aren't in the repository.  It's pretty much standard
cvs practice to do this.