Implements Jameson-only primitives in Snap! using the Crackle SDK.
First, download the latest Crackle extension from here and unzip it. Follow these instructions to install it.
Afterwards, obtain a copy of the mod here. Visit Snap! and click the plus button:
Click Load mod from file... and select the JS file that you downloaded earlier.
Note that the libraries for using these primitives are not included.