Update ChangeLog and configure.ac for ver. 0.7.3

snf-image-helper/ChangeLog

+2013-01-04, v0.7.3
+
 2013-01-04, v0.7.2
 	* In windows images make sure the file C:\Window\panther\Unattend.xml
           gets removed after sysprep runs

snf-image-helper/configure.ac

 AC_PREREQ(2.59)
-AC_INIT(snf-image-helper, 0.7.2, synnefo@lists.grnet.gr)
+AC_INIT(snf-image-helper, 0.7.3, synnefo@lists.grnet.gr)
 
 AC_CONFIG_AUX_DIR(autotools)
 AC_CONFIG_SRCDIR(configure)

snf-image-host/ChangeLog

+2013-01-04, v0.7.3
+	* Fix multistrap.conf to work with apt2.dev.grnet.gr
+
 2013-01-04, v0.7.2
 	* Change snf-image-helper repository to apt2.dev.grnet.gr
 

snf-image-host/configure.ac

 AC_PREREQ(2.59)
-AC_INIT(snf-image, 0.7.2, synnefo@lists.grnet.gr)
+AC_INIT(snf-image, 0.7.3, synnefo@lists.grnet.gr)
 
 AC_CONFIG_AUX_DIR(autotools)
 AC_CONFIG_SRCDIR(configure)