Mostly design changes

Changed the look of the artists on artists.php to the 'record' look.
Made the picture in 'artist.php' no longer floated and is now centered.
Changed social icons in header.php.
Created gallery-data.php which will be for loading the gallery images
via php
More design changes

Artist page name has banner appearance.
Various sections getting a background colour + inner padding.
Gallery is now tiled with no gaps.