Merge pull request #60 from lategoodbye/master

Improve event handling and support to send user data
Add manufacturer ID for Rossweiner
Sync behavior to mbus-serial-request-data-multi-reply
- init slaves before requesting data
- free ressources before exit
- refactor data request
- fix comments
Merge remote-tracking branch 'upstream/master'
Add product name mapping for Rossweiner Modularis
Seperate retransmission maximum in two parameters
one for data requests and another for search requests
- add new handle member for max search retransmission
- set default maximum for search retransmission to one
- rename define for retransmission option
Use new retransmission option and handle member