Rewrite branch not recognized as plugin

[afragen]

It seems that WP want to see the plugin headers with a following : and no space. Otherwise the header isn't recognized.

wp-includes/functions.php line 5182 in trunk

    foreach ( $all_headers as $field => $regex ) {
        if ( preg_match( '/^[ \t\/*#@]*' . preg_quote( $regex, '/' ) . ':(.*)$/mi', $file_data, $match ) && $match[1] ) {
            $all_headers[ $field ] = _cleanup_header_comment( $match[1] );
        } else {
            $all_headers[ $field ] = '';
        }
    }

[norcross]

@afragen take a look at this commit, it should resolve the issue.