Go ahead and add at least this version of at() from Charlie Groves.
Go ahead and add at least this version of at() from Charlie Groves.

We may add some other at()s, and probably remove all the set*() methods, because
they are not that useful and ambiguous w/r/t HOUR vs. HOUR_OF_DAY, etc.


git-svn-id: 64ebf368729f38804935acb7146e017e0f909c6b@2621 6335cc39-0255-0410-8fd6-9bcaacd3b74c

samskivert/samskivert,samskivert/samskivert