Changes from Dan Nicolaescu:
For vc-p4.el:
- delete a few more vc functions that are identical in emacs
- delete now unused vc-p4-change-times
- make vc-p4-annotate-command default to the internal elisp code
- delete vc-p4-state-heuristic, it's the same as the default
- new function vc-p4-find-version
- make a few functions cope with emacs-23 (not released yet),
that changes the first argument from FILE to FILE_LIST
- add an internal implementation for vc-annotate, simplify the
annotate code
For p4-lowlevel.el:
- fail graciously when offline and trying to access a file that
is under perforce