* Enable BMW component to be unit system aware
* lint fixes
* use constants for config entries
* remove configuration from component and rely only on HA config of unit_system
* remove unused import
* update code to reflect feedback
* lint fixes
* remove unnecessary comments
* rework return statement to satisfy pylint
* more lint fixes
* add tests for volume utils
* lint fixes
* more lint fixes
* remove unnecessary comments
## Description:
More fixes flagged by pylint 2 that don't hurt to have before the actual pylint 2 upgrade (which I'll submit soon).
## Checklist:
- [ ] The code change is tested and works locally.
- [x] Local tests pass with `tox`. **Your PR cannot be merged unless tests pass**
* implemented services for bmw remote services
* added vin to attributes of tracker
* moved component to new package
* added service description
* fixed static analysis warnings
* implemented first set of code reviews
* removed locking related services
* fixed static analysis warnings
* removed excess blank lines
* refactoring of setup() to resolve warning
"Cell variable bimmer defined in loop (cell-var-from-loop)"
* added missing docstring
* added service to update all vehicles from the server
* implemented changes requested in code review
* added check if invalid vin is entered