The package will be named as following: <tag_name>-<date>_binaries.tar.gz
If the <tag_name> does not start with the "official" wr-switch-sw- prefix
a forced prefix 'wr-switch-sw-unof-' will be added.
Examples:
  * wr-switch-v3.3.1 => wr-switch-sw-v3.3.1-20130902_binaries.tar.gz
  * v3.1-rc1         => wr-switch-sw-unof-v3.1-rc1-20130521_binaries.tar.gz