v1.0.1 — edge guard

Fixes flicking past the first or last space, which landed the Dock on a nonexistent index and showed a black screen. On the gesture's began phase spaceflick now reads the ordered space list for the display under the pointer, and passes the release through untouched when it heads off either end so macOS rubber-bands as usual.

Also new: an icon, a much shorter README, and the tap renamed to julienR2/tap — install is now brew install julienR2/tap/spaceflick.