Remove deprecated stuff from DBusInterface
API version should be 2.0 (as we removed deprecated fields)
Add API version history to documentation
Merge typedCallWithReturn into typedCall
Merge emitSignal and emitSignalWithArguments
[api] Implement setProperty on DBusInterface
Version in documentation should be 2.0.0
[rpm] Bump version to 2.0.0
[signals] Document signal handling, easier name mangling