changelog and man page update for genesys update

ChangeLog

@@ -1,3 +1,7 @@
+2011-06-07 Stéphane Voltz <stef.dev@free.fr>
+	* backend/genesys.c backend/genesys.h backend/genesys_conv.c:
+	add blank page skipping and rotation detection options
+
 2011-06-06 m. allan noah <kitno455 at gmail dot com>
 	* docs/*kvs40xx*, backend/kvs40xx*: New Panasonic KV-S40xx/70xx
 	backend, originally by Panasonic Russia.

doc/sane-genesys.man

@@ -106,6 +106,16 @@ image, and counter the rotation.
 .RS
 	Requests the driver to find and remove dots of X diameter or smaller from the 
 image, and fill the space with the average surrounding color.
+.RE
+.PP
+.B \-\-swskip 0..100% (in steps of 1) [0]
+.RS
+        Request driver to discard pages with low numbers of dark pixels
+.RE
+.PP
+.B \-\-swderotate[=(yes|no)] [no]
+.RS
+        Request driver to detect and correct 90 degree image rotation
 
 .PP
 .SH "SYSTEM ISSUES"