2nd Dose Data + Broken Chart removal

Merge pull request #9 from b-kennedy0:b-kennedy0/issue8

Broken chart - 2nd dose figures

Adult-only population data

v1.4

new poopulation data

Transparency in population data

Included updates to make population data open (About section). Updates to include version numbering on home and about sections. Rephrasing About section for conciseness.

Change app location url

This release updates the location load of the app to https://bradleykennedy.co.uk/apps/covid for consistency in app locations. https://apps.bradk.co.uk

Interface update

Update in: b117b0e

Initial release

v1.0

Update README.md