Merge branch 'master' into release/v3.5.0

Update Thread DFU logging (NordicSemiconductor#112)

* Improve Thread DFU logging

* Add progress bar to Thread multicast DFU operation

Bump to v3.3.0

Remove py2exe from setup.py to fix build

Merge pull request NordicSemiconductor#82 from NordicSemiconductor/fe…

…ature/sd-id

SD-ID updated

Merge pull request NordicSemiconductor#77 from NordicSemiconductor/do…

…c/family-options

Document the --family option in README.md