Fix display of the canvas color when template is used

See merge request !11

Implement user notices

Closes #53

See merge request !10

Queue & run canvas redis cache in worker

Closes #82

See merge request sc07/canvas!9

Improve handling of the user pixel stack

See merge request sc07/canvas!8

Pixel placement log / pixels.log

Closes #57

See merge request !4

Google Recaptcha (version 1)

Closes #38

See merge request !7

Moderation Square Undo

Closes #16

See merge request !6

Canvas Freezing

See merge request !5

Fixes #68