Fixed make dist to avoid date on package version

configure.ac

@@ -32,7 +32,9 @@ m4_define([project_base_version],
 m4_define([project_full_version],
           [m4_if(project_nano_version, [0],
                  project_base_version, project_base_version.project_nano_version)])
-
+# You should set project_released to one in order to mark this as a released version
+# and to avoid date on version number
+m4_define(project_released, [1])
 m4_define([project_maybe_datestamp],
           m4_if(project_released, [1],
                 [], [m4_esyscmd([date +.%Y%m%d | tr -d '\n\r'])]))