Update theme.toml

Fix deprecation warning

Fix default posy for watermark image

Update README.md

Allow images to be passed in as a slice

Fixes #21

Add pointer-events: none to thumbnail for loaded modal

Fix scroll issue on Android (#14)

Fixes #13

Consider both fingers when moving when pinching (#12)

Implement pinch zooming on mobile (#11)

Fixes #10

Fixed swiping direction on mobile (#8)