README: Describe meaning of copyright year ranges.
authorBen Pfaff <blp@cs.stanford.edu>
Sun, 2 Jan 2011 16:37:31 +0000 (08:37 -0800)
committerBen Pfaff <blp@cs.stanford.edu>
Sun, 2 Jan 2011 18:52:34 +0000 (10:52 -0800)
commitab94b96a546c01fef1f15f9d842fb5e5eee9376e
tree7e735fba0a4a4d6c368ad994420ae3f66d7fdd27
parentd46afd1378808540ee8c8a33c1a00d57cf80f48d
README: Describe meaning of copyright year ranges.

This is required by the GNU maintainers guide as a prerequisite for using
copyright year ranges.  So far, PSPP itself doesn't use ranges, but Gnulib
(which PSPP uses) does.
README