v0.4

• Added first canonical data set (Czech Republic).
• Added CHANGELOG.md
• Created "Data Sources" and added datasources.md.
• Added language selection (CZ, EN) including a new structure for language files.
• Removed To-Do from README.md (will be listed in issues from now on).

v0.3

• Removed info banner/title
• Added sidebar with information on the project and the creators.
• Added a layover popup with recommended actions and a link to the Swiss FOPH.
• Added CONTRIBUTING.md
• Tweaked the data source variables.
• Added icon for unconfirmed medical institutions.
• Added a layer selection to the page.