Add spongebob mocking meme generator

[InDieTasten]

See:

Doesn't have to as fancy with the speech bubble, but a generator in general would be nice.

[RicoBrase]

Possible wontfix - not sure yet.
For the time being, the app should follow the KISS principle.

Adding an image generator will increase the complexity of the app by a fair margin - e.g. UI wise.

For now, the best would be generating the mocked text and paste it in an existing meme generator, e.g. https://imgflip.com

Might implement this later. Ideas for a good UI integration are welcomed.

[InDieTasten]

UX:

1. Enter your text
2. Click "mock this shit" button
3. Beneath button, the meme preview is displayed
4. Preview image has default browser context menu for saving or copying the image

Technical implementation:

• Create an svg image xml with the spongebob meme backdrop and a bound text for the user "input" as text node.
• Convert svg to png object url
• display png object url in html image tag

This way all the work is client-side.