Purr Data 2.17.0 has been released.

This includes some commits from GSoC applicants Gabriela Bittencourt
and Rukshan Senanayaka. Note also that though we're not yet versioning
the web app, it has also benefited from a large number of commits from
GSoC applicants: Prakhar Agarwal, Sanket Bhukan, Akash Negi, and
Gunjan Yadu. Thanks to all for your contributions.

ChangeLog:

• incremental search in the help browser (Gabriela Bittencourt)
• new declare -zoom option, useful for teaching (AG)
• pddplink now accepts a symbol on its 1st inlet, loses its superfluous outlet (AG)
• major cleanup of the GUI presets, especially the dark ones work much better now (JW)
• styling the svg background "lock" image to match the chosen preset style (Rukshan Senanayaka)
• arm64 support for the OBS Debian/Ubuntu builds (AG)