Parse datetime objects correctly

Filter activities by date range (#79)

* Add options to filter activities by date range

* Clarify argument help text

* Fix line indentation

* Update demo plots

* Add date range command line arguments

Define consistent colour palette across plots (#64)

* Define and use universal colour palette

* Update colour palette and method comments

* Define colour palette with flat UI colours

Add Plots section to README (#43)

Update documentation (#20)

* [README] Add HERE CLI installation section

* [README] Embed HERE XYZ demo activity map

* [Media] Add screenshot of HERE XYZ demo activity map

* [README] Add screenshot + hyperlink to demo activity map

* [README] Add Usage section

Merge pull request #15 from FelixVanOost/Documentation

Documentation