Documentation update. Man page describes -v -V option combination.

src/exiv2.1

@@ -3,7 +3,7 @@
 .\" First parameter, NAME, should be all caps
 .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 .\" other parameters are allowed: see man(7), man(1)
-.TH EXIV2 1 "Mar 23, 2012"
+.TH EXIV2 1 "Oct 18, 2012"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -125,6 +125,12 @@ Display help and exit.
 .TP
 .B \-V
 Show the program version and exit.
+.br
+When -V is combined with -v (Verbose version), build information is
+printed to standard output along with a list of shared libraries which
+have been loaded into memory. Verbose version is supported on Windows
+(both MSVC and Cygwin builds), MacOSX and Linux and is provided
+for test and debugging.
 .TP
 .B \-v
 Be verbose during the program run.