Change some command keys

Change 'v' from #versionshort to #chronicle.
Change 'V' from #history to #versionshort.
History can still be accessed either directly with the extended command,
or via the help menu.
Versionshort now accepts the m-prefix, and then shows the longer version.

doc/fixes3-7-0.txt

@@ -1586,6 +1586,8 @@ priest donation amounts are explicitly stated, randomized slightly, based on
        peak rather than current level, and allow for bulk donations (buying
        larger amounts of clairvoyance/protection) if you have a lot of gold
 amulet of magical breathing increases power regeneration
+change some command keys, 'v' is now chronicle, 'V' is versionshort,
+	m-prefix 'V' is longer version, remove key binding of #history
 
 
 Fixes to 3.7.0-x General Problems Exposed Via git Repository