MacMercurial updated to version 1.3

[James Walker]

* Optionally, when MacMercurial starts up, it reopens documents that 
were open when it last quit.

* One can do diffs of two revisions of a file or repository by selecting 
two revisions in a log list and then invoking Differences.

* There is a new menu command to revert a file to a selected revision.

* The log window will now use the "medium" date and time formats 
specified in the International preferences panel.

* It is easier to use FileMerge as a diff tool.

* A crashing bug in Save File Revision As has been fixed.

* It is no longer necessary to have the fetch and extdiff extensions 
enabled in your .hgrc file.

* I have abandoned attempts to be compatible with Panther (OS 10.3.x).

If you already have MacMercurial 1.2, you can use the "Check for 
Updates" menu item to get the update.  Otherwise, go to 
<http://www.jwwalker.com/pages/macmerc.html>.