py3: Use print() function
tools: Remove unused dev tools
zeroconf: Make public API with docs
docs: Add note about public APIs and API stability
models: Add lightweight Ref model with URI, name, and type
models: Add description of Ref model
Merge pull request #621 from jodal/feature/ref-model

models: Add lightweight Ref model with URI, name, and type
Merge branch 'develop' of https://github.com/mopidy/mopidy into develop
Merge branch 'develop' of github.com:kingosticks/mopidy into develop