* Initial commit of De Lijn (Flemish Public Transport) component
* Code corrections as per HA dev's requests
* changes to variable naming, setting attribution and states, plus some smaller optimizations
* Overlooked some linting issues, these are now fixed
* Updated pydelijn version requirement to 0.5.1 so UTC timestamps can be used instead of relative/local times.
Removed unused definition
* Updated pydelijn version requirement to 0.5.1 in requirements_all.txt
* Update the self._attributes dict directly instead of replacing it
Assign ATTRIBUTION while creating the _attributes dict
Remove the ATTRIBUTION assignment in device_state_attributes as it's updated in the async_update now.
* Linting issue (lenght of 2 lines) solved
* Removed a relative time attribute
Updated a linting issue in the LOGGER (used % instead of the format)
Bram Goolaerts