Relax the values that CTYPE can take for changes-entry and related
targets.  Values are now case-insensitive, and the expanded set of values
that can be used are:

Added => add*
Updated => up*
Removed => rem*, rm
Renamed, Moved => ren*, mov*, mv

This changes is purely for usability reasons -- I have trouble remembering
the exact values, and I don't like to type with capitalization unless.

(jlam)