Up version to 1.10

Notable changes:
* Shorten syslog name to work with rsyslog (#172)
* Update config file with grace period in  all cases (#193)
* Remove printing QR code using Google Charts URL (it's turned down)

configure.ac

@@ -1,5 +1,5 @@
 AC_PREREQ(2.61)
-AC_INIT(google-authenticator, 1.09, habets@google.com)
+AC_INIT(google-authenticator, 1.10, habets@google.com)
 AC_CONFIG_SRCDIR([src/google-authenticator.c])
 AC_CONFIG_AUX_DIR([build])
 AC_CONFIG_MACRO_DIR([build])