Add new attributes to Pixel Viewer interactive

[Jack Morgan]

The following features should be developed for Pixelmania:

1. A new URL parameter hide-colour-code-picker should hide the options to change the colour code type.
2. This image should be added to the available set.
3. A new URL parameter pixelmania should show a small Pixelmania logo above the interactive title in the menu.

[Alasdair Smith]

• Can I get a copy of said Pixelmania Logo?
• The other images have copyright notices, does this pier one have one?

[Jack Morgan]

• Logo sent via Slack
• The image is mine, and is under the standard project CC license.

[Jack Morgan]

Could you also rename the photo lake.png when adding it to Pixel Viewer? Will make it nicer to reference in the URL.

[Alasdair Smith]

Could you also rename the photo lake.png when adding it to Pixel Viewer? Will make it nicer to reference in the URL.

Was gonna say 'pier' but that also works 👍