0.5.65

A maintenance update which fixes some issues with rendering embeds in Dataviews and adds a few new functions.

• Adds the hash() function for generating consistent uniformly-distributed values given arbitary inputs. Primarily useful for creating "random" views which remain consistent across page refreshes. Thanks to @holroy.
• Adds the slice() function for slicing arrays, similar to Javascript's Array.slice. Thanks to @holroy.
• Fixes several issues with rendering embeds inside dataviews. Thanks to @GottZ.
• Several documentation improvements around tasks - thanks to @holroy and @RaviOnline.