Install from within WordPress fails

Clicking Install Plugin will result in failure. ZIP file contains entire svn-tree, not just the plugin.

Inspection of the readme file reveals stagle tag 1.0.0, a listing of the tag /tags/1.0.0 shows the entire root.

I suspect you tagged wrong, perhaps typed
svn copy http://plugins.svn.wordpress.org/wp-google-authenticator/ http://plugins.svn.wordpress.org/wp-google-authenticator/tags/1.0.0
instead of
svn copy http://plugins.svn.wordpress.org/wp-google-authenticator/trunk/ http://plugins.svn.wordpress.org/wp-google-authenticator/tags/1.0.0

http://wordpress.org/plugins/wp-google-authenticator/