Changes for plenigo perl SDK

2.0006  2018-11-27
        - Bugfixes
        
2.0005  2018-11-27
        - Added https://api.plenigo.com/#!/user/getSubscriptionsBought functionality

2.0004  2018-11-21
        - Removed Carp::Always

2.0003  2018-08-16
        - first version of the plenigo Perl SDK