Merge branch 'hotfix/V1.1.2_b'
Fix firmware version check
Only require Qt when using imageviewer
Require Python 3 or fail with meaningfull error message
Merge pull request #1 from JensErat/fix-version-compare

Fix firmware version check
Merge pull request #3 from JensErat/add-optional-qt

Only require Qt when using imageviewer
Merge pull request #4 from JensErat/add-python3-check

Require Python 3 or fail with meaningfull error message
Create LICENSE.md

Add license, fixes #2
Merge branch 'master' into dev